Lady Gaga Cancels Born This Way Ball Tour Due to Severe Injury

02/13/2013 at 08:50 PM EST

It's a somber week for Lady Gaga – and her Little Monsters.

Following Tuesday's Facebook announcement that she was "devastated and sad" because she couldn't walk and had to postpone several Born This Way Ball concerts, the pop star, 26, has officially canceled the remaining dates of her world tour.

"After additional tests this morning to review the severity of the issue, it has been determined that Lady Gaga has a labral tear of the right hip," the singer's rep told PEOPLE Wednesday in a statement. "She will need surgery to repair the problem, followed by strict down time to recover. This unfortunately, will force her to cancel the tour, so she can heal."

Refunds for the cancelled performances will be available at point of purchase starting on Thursday.

"I hope you can forgive me, as it is nearly impossible for me to forgive myself," she wrote the previous day of postponing the dates. "I hate this. I hate this so much. I love you and I'm sorry."

Get well, Gaga!

•Reporting by CHUCK ARNOLD

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Clues to why most survived China melamine scandal

WASHINGTON (AP) — Scientists wondering why some children and not others survived one of China's worst food safety scandals have uncovered a suspect: germs that live in the gut.

In 2008, at least six babies died and 300,000 became sick after being fed infant formula that had been deliberately and illegally tainted with the industrial chemical melamine. There were some lingering puzzles: How did it cause kidney failure, and why wasn't everyone equally at risk?

A team of researchers from the U.S. and China re-examined those questions in a series of studies in rats. In findings released Wednesday, they reported that certain intestinal bacteria play a crucial role in how the body handles melamine.

The intestines of all mammals teem with different species of bacteria that perform different jobs. To see if one of those activities involves processing melamine, researchers from the University of North Carolina at Greensboro and Shanghai Jiao Tong University gave lab rats antibiotics to kill off some of the germs — and then fed them melamine.

The antibiotic-treated rats excreted twice as much of the melamine as rats that didn't get antibiotics, and they experienced fewer kidney stones and other damage.

A closer look identified why: A particular intestinal germ — named Klebsiella terrigena — was metabolizing melamine to create a more toxic byproduct, the team reported in the journal Science Translational Medicine.

Previous studies have estimated that fewer than 1 percent of healthy people harbor that bacteria species. A similar fraction of melamine-exposed children in China got sick, the researchers wrote. But proving that link would require studying stool samples preserved from affected children, they cautioned.

Still, the research is pretty strong, said microbiologist Jack Gilbert of the University of Chicago and Argonne National Laboratory, who wasn't involved in the new study.

More importantly, "this paper adds to a growing body of evidence which suggests that microbes in the body play a significant role in our response to toxicity and in our health in general," Gilbert said.

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Federal appeals court weighs overturning Barry Bonds' conviction

SAN FRANCISCO —A federal appeals court wrestled Wednesday with whether to overturn slugger Barry Bonds' felony conviction for obstruction of justice.

The three-judge panel of the U.S. 9th Circuit Court of Appeals weighed whether Bonds broke the law by being evasive in a 52-word answer he gave a federal grand jury in 2003. The grand jury was investigating illegal distribution of performance-enhancing drugs.

Bonds was asked in the grand jury session whether his personal trainer had ever given him a substance that required a syringe to inject. In his response, Bonds rambled on about his childhood and his friendship with the trainer before finally telling the grand jury that he had not received an injectable substance.

The grand jury eventually indicted Bonds, and he was tried in 2011 on three counts of perjury and one count of obstruction. The trial jury convicted him of obstruction of justice, based on that meandering answer, but it deadlocked on the perjury charges.

How the three-judge panel was leaning after Wednesday's hearing was nearly as difficult to parse as Bonds' answer. Judge Michael Daly Hawkins appeared troubled by the fact that Bonds eventually answered the grand jury query: "Can a grand jury witness obstruct justice by giving a series of evasive answers and then giving a direct answer that is not evasive?" Hawkins asked.

Assistant U.S. Atty. Merry Jean Chan, however, said Bond's rambling response was intended to deceive. She argued that the obstruction conviction was not limited to those 52 words but reflected evasion throughout Bonds' testimony.

Hawkins then questioned why prosecutors, if they thought Bonds was being evasive, did not go before a judge to ask that Bonds be ordered to answer the grand jury's questions.

Dennis Riordan, an attorney for Bonds, told the court that the grand jury was not troubled by the 52-word passage that led to the trial jury's conviction years later.

"There is one thing we know for sure," Riordan said. "This grand jury did not consider those 52 words were criminal activity.... That is a dagger in the heart of this conviction."

Chan countered that Bonds' testimony was "littered with multiple examples" of misleading testimony.

Bonds' conviction came at the end of a 12-day trial. He was sentenced to two years probation, 250 hours of community service, a $4,000 fine and a month of monitored home confinement, all of which have been put on hold pending his appeal.

The 9th Circuit panel, which included Judges Mary Schroeder and Mary Murguia, did not indicate when it might rule.

maura.dolan@latimes.com

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India Ink: Silicon Valley and Immigrant Groups Find Common Cause

SAN FRANCISCO — What do computer programmers and illegal immigrants have to do with each other?

When it comes to the sweeping overhaul of the nation’s immigration laws that Congress is considering this year, the answer is everything.

Silicon Valley executives, who have long pressed the government to provide more visas for foreign-born math and science brains, are joining forces with an array of immigration groups seeking comprehensive changes in the law. And as momentum builds in Washington for a broad revamping, the tech industry has more hope than ever that it will finally achieve its goal: the expanded access to visas that it says is critical to its own continued growth and that of the economy as a whole.

Signs of the industry’s stepped-up engagement on the issue are visible everywhere. Prominent executives met with President Obama last week. Start-up founders who rarely abandon their computers have flown across the country to meet with lawmakers.

This Tuesday, the Technology CEO Council, an advocacy organization representing companies like Dell, Intel and Motorola, had meetings on Capitol Hill. On Wednesday, Steve Case, a founder of AOL, is scheduled to testify at the first Senate hearing this year on immigration legislation, alongside the head of the deportation agents’ union and the leader of a Latino civil rights group.

“The odds of high-skilled passing without comprehensive is close to zero, and the odds of comprehensive passing without high-skilled passing is close to zero,” said Robert D. Atkinson, president of the Information Technology and Innovation Foundation, a nonpartisan research group based in Washington.

The push comes as a clutch of powerful Senate Republicans and Democrats have reached a long-elusive agreement on some basic principles of a “comprehensive” revamping of immigration law. Separately, a bipartisan bill introduced in the Senate in late January focuses directly on the visa issue.

The industry’s argument for more so-called high-skilled visas has already persuaded the president.

“Real reform means fixing the legal immigration system to cut waiting periods, reduce bureaucracy, and attract the highly-skilled entrepreneurs and engineers that will help create jobs and grow our economy,” Mr. Obama said in Tuesday’s State of the Union speech.

In a speech in Las Vegas in January in which he introduced his own blueprint for overhauling immigration law, Mr. Obama embraced the idea that granting more visas was essential to maintaining innovation and job growth. He talked about foreigners studying at American universities, figuring out how to turn their ideas into businesses.

In part, the new alliance between the tech industry and immigration groups was born out of the 2012 elections and the rising influence of Hispanic voters.

“The world has changed since the election,” said Peter J. Muller, director of government relations at Intel, pointing out that the defeat of many Republican candidates had led to a softening of the party’s position on broad changes to immigration law. “There is a focus on comprehensive. We’re thrilled by it.”

“At this point,” he added, “our best hope for immigration reform lies with comprehensive reform.”

Mr. Case, the AOL co-founder, who now runs an investment fund, echoed that sentiment after meeting with the president last Tuesday.

“I look forward to doing whatever I can to help pass comprehensive immigration reform in the months ahead,” he said, “and ensure it includes strong provisions regarding high-skilled immigration, so we are positioned to win the global battle for talent.”

That sort of sentiment delights immigrants’ rights advocates who have banged their heads against the wall for years to rally a majority of Congress around their agenda.

“The stars are aligning here,” said Ali Noorani, executive director of the National Immigration Forum. “You’ve got the politics of immigration reform changing. You’ve got tech leaders leaning in not just for high-skilled but for broader immigration reform.”

Senator Orrin G. Hatch, Republican of Utah, who is co-sponsoring the bill to increase the number of visas available for highly skilled immigrants, said the cooperation went both ways.

“All the talk about the STEM field — science, technology, engineering, mathematics — has awakened even those who aren’t all that interested in the high-tech world,” he said.

While the growing momentum has surprised many in Washington, comprehensive change is still not a sure thing, especially in the Republican-controlled House.

Mr. Hatch said he would push forward with his measure even if the broader efforts foundered. But his Democratic co-sponsor, Amy Klobuchar of Minnesota, said she would press for the bill to be part of the comprehensive package.

Last year, technology executives had a taste of what could happen with stand-alone legislation.

In November the House passed a bill, sponsored by Representative Lamar S. Smith, Republican of Texas, that would have provided 55,000 visas for foreigners graduating from American universities with advanced degrees in STEM fields. Mr. Smith, then the chairman of the House Judiciary Committee, brought considerable clout, and the tech industry rallied behind the bill.

But the legislation died in the Senate, because Democrats wanted any technology-specific measure to be part of a broader bargain that would include more visas for family members.

In pressing its case, the industry has used some vivid examples to sway lawmakers, arguing that if skilled workers cannot get visas, tech companies will simply move the jobs overseas.

Facebook was the latest to make this case. It said it had to place nearly 80 engineers in its office in Dublin in 2011 because it could not obtain even temporary work visas to employ them at the company’s headquarters in Menlo Park, Calif. Those temporary visas, called H-1B visas, are capped at 60,000 a year and usually run out within a couple of months. The bill proposed by Mr. Hatch and Ms. Klobuchar would more than double that number.

Microsoft has also argued that the visa backlog takes jobs out of the United States, saying it was forced to open a development office in Vancouver.

Hundreds of thousands of foreigners, the largest share from India and China, come to American universities every year to study science and engineering. But it can take so long for them to get permanent residency that many end up returning home. Mr. Hatch said he was keen to see foreign-born graduates of American universities remain in this country rather than work for competitive firms elsewhere.

“China, India — they would love to have these Ph.D.’s return to their countries,” he said. “They see the benefits. Why can’t we?”

There is no dearth of jobs in Silicon Valley. Employment in San Francisco and its southern suburbs grew about 3.6 percent in 2012, twice the growth rate nationally, according to a study released last week by Joint Venture Silicon Valley, a nonpartisan research organization.

But many of those jobs are filled by foreigners. In San Mateo and Santa Clara Counties, nearly two-thirds of those employed in science- and engineering-related jobs were born abroad, compared with about one-fourth nationwide, according to the study.

Industry executives hope to employ many more.

“The issue has truly ripened,” said Bruce Mehlman, a veteran Washington lobbyist and executive director of the Technology CEO Council. “Levels of optimism are higher than they’ve been in a while.”

Julia Preston contributed reporting from New York.

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Larry Bird's Son Connor Arrested

02/12/2013 at 10:00 PM EST

Conner Bird

Monroe County Sheriff’s Office/AP

Basketball star Larry Bird's son is in trouble with the law.

According to CBS Chicago, 21-year-old Connor Bird was involved in an argument with an ex-girlfriend at his apartment on Sunday afternoon and reportedly threw a cell phone at her.

Hours later, the two drove to a nearby parking lot where the woman got out of the car, intending to walk home, and Conner allegedly attempted to hit her twice with his vehicle.

Bird was later arrested by the Indiana University Police on charges of battery with injury, criminal mischief, intimidation with a deadly weapon and possession of marijuana. He is now free on bail. No trial date has been set.

A lawyer for Bird tells PEOPLE: "What has happened is a very private matter. We’re trying to resolve this as quickly as possible and we're all thankful no one was seriously injured."

Bird was reportedly arrested in 2011 for underage drinking and disorderly conduct, according to TMZ.

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Study questions kidney cancer treatment in elderly

In a stunning example of when treatment might be worse than the disease, a large review of Medicare records finds that older people with small kidney tumors were much less likely to die over the next five years if doctors monitored them instead of operating right away.

Even though nearly all of these tumors turned out to be cancer, they rarely proved fatal. And surgery roughly doubled patients' risk of developing heart problems or dying of other causes, doctors found.

After five years, 24 percent of those who had surgery had died, compared to only 13 percent of those who chose monitoring. Just 3 percent of people in each group died of kidney cancer.

The study only involved people 66 and older, but half of all kidney cancers occur in this age group. Younger people with longer life expectancies should still be offered surgery, doctors stressed.

The study also was observational — not an experiment where some people were given surgery and others were monitored, so it cannot prove which approach is best. Yet it offers a real-world look at how more than 7,000 Medicare patients with kidney tumors fared. Surgery is the standard treatment now.

"I think it should change care" and that older patients should be told "that they don't necessarily need to have the kidney tumor removed," said Dr. William Huang of New York University Langone Medical Center. "If the treatment doesn't improve cancer outcomes, then we should consider leaving them alone."

He led the study and will give results at a medical meeting in Orlando, Fla., later this week. The research was discussed Tuesday in a telephone news conference sponsored by the American Society of Clinical Oncology and two other cancer groups.

In the United States, about 65,000 new cases of kidney cancer and 13,700 deaths from the disease are expected this year. Two-thirds of cases are diagnosed at the local stage, when five-year survival is more than 90 percent.

However, most kidney tumors these days are found not because they cause symptoms, but are spotted by accident when people are having an X-ray or other imaging test for something else, like back trouble or chest pain.

Cancer experts increasingly question the need to treat certain slow-growing cancers that are not causing symptoms — prostate cancer in particular. Researchers wanted to know how life-threatening small kidney tumors were, especially in older people most likely to suffer complications from surgery.

They used federal cancer registries and Medicare records from 2000 to 2007 to find 8,317 people 66 and older with kidney tumors less than 1.5 inches wide.

Cancer was confirmed in 7,148 of them. About three-quarters of them had surgery and the rest chose to be monitored with periodic imaging tests.

After five years, 1,536 had died, including 191 of kidney cancer. For every 100 patients who chose monitoring, 11 more were alive at the five-year mark compared to the surgery group. Only 6 percent of those who chose monitoring eventually had surgery.

Furthermore, 27 percent of the surgery group but only 13 percent of the monitoring group developed a cardiovascular problem such as a heart attack, heart disease or stroke. These problems were more likely if doctors removed the entire kidney instead of just a part of it.

The results may help doctors persuade more patients to give monitoring a chance, said a cancer specialist with no role in the research, Dr. Bruce Roth of Washington University in St. Louis.

Some patients with any abnormality "can't sleep at night until something's done about it," he said. Doctors need to say, "We're not sticking our head in the sand, we're going to follow this" and can operate if it gets worse.

One of Huang's patients — 81-year-old Rhona Landorf, who lives in New York City — needed little persuasion.

"I was very happy not to have to be operated on," she said. "He said it's very slow growing and that having an operation would be worse for me than the cancer."

Landorf said her father had been a doctor, and she trusts her doctors' advice. Does she think about her tumor? "Not at all," she said.

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Online:

Kidney cancer info: http://www.cancer.net/cancer-types/kidney-cancer

and http://www.cancer.gov/cancertopics/types/kidney

Study: http://gucasym.org

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Marilynn Marchione can be followed at http://twitter.com/MMarchioneAP

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Officials call for probe of sale of bulletproof vests

Local officials Tuesday called for investigations into the Los Angeles County Sheriff's Department funneling hundreds of bulletproof vests to Cambodia through the city of Gardena.

Supervisor Mark Ridley-Thomas requested an audit to determine whether officials violated the law in shipping the vests a decade ago to the Southeast Asian country. A Gardena official also said she would be asking for an investigation into her city being used as an intermediary for the unusual transaction.

The announcements Tuesday were prompted by a Times investigation published over the weekend that found that sheriff's ballistic vests were shipped to Cambodia and not declared to customs officials, as required by federal law. Instead, they were stuffed inside one of a number of patrol cars that the Sheriff's Department was shipping directly to Cambodia, avoiding the rigorous vetting process the U.S. government requires to prevent body armor from getting into the wrong hands abroad.

Sheriff's media representatives gave The Times differing accounts about the transaction, initially denying any sheriff's officials were involved in sending the vests to Cambodia, then offering explanations contradicted by records and interviews. The officials involved in the transaction refused to discuss it.

"Federal, state and local statutory, legal and policy violations may have occurred with these transactions," read a motion by Ridley-Thomas.

Gardena Mayor Pro Tem Rachel Johnson said she was troubled by the alleged role that the city's mayor, Paul Tanaka, played in the sales. Tanaka is the second-in-command at the Sheriff's Department.

She said she also wanted to know why her city manager approved the transaction. Records showed the city manager pledged under the penalty of perjury that the vests were intended for Gardena, despite later telling federal authorities he knew they would be diverted to Cambodia.

"I'm concerned about the appearance of a cover-up," Johnson said in an interview with The Times.

It is not unusual for U.S. law enforcement agencies to donate used or obsolete equipment to other departments, including foreign ones. But in this case, the vests were shipped using an intermediary and were not declared on their way out of the country. The vests were ostensibly sold to Gardena, but were never claimed by the city before being shipped to Cambodia.

The U.S. Customs Service launched an investigation into the sale of the vests in 2002, and federal agents were told that the transactions were coordinated by Tanaka, according to records obtained by The Times. A sheriff's spokesman called Tanaka's role minimal, saying it was a former undersheriff who called the Gardena city manager to coordinate the sales.

Customs agents decided not to seek criminal charges, concluding that there wasn't enough evidence to show that anyone involved in the transactions knew the relevant export laws. One expert told The Times that that rationale was "curious" because authorities don't have to prove knowledge of the law to press charges.

After closing the case, federal authorities referred the matter to sheriff's investigators, but the department did not conduct its own investigation. But a sheriff's spokesman said the department did nothing wrong and sent the vests through Gardena because they were under the mistaken impression that county rules prevented them from dealing directly with foreign nations. Prompted by The Times' inquiry, Sheriff Lee Baca asked the county auditor-controller's office to examine the sale, and Baca's spokesman called that review "a complete vindication." But Baca only told the auditor-controller that the vests were sold to Gardena, not that Gardena was a go-between to get the vests to Cambodia.

The audit Ridley-Thomas proposed would include that, and determine if any sheriff's or Gardena officials committed "any fraudulent or illegal activity." If his motion is approved and the audit is launched, the final report would be forwarded to county and federal prosecutors for further action.

Johnson, who is running to replace Tanaka as mayor of Gardena, said she was a city clerk at the time of the transactions and never knew about them. "I'm very disappointed that [Tanaka] has involved our city manager, our city resources in these questionable practices," she said.

Sheriff's spokesman Steve Whitmore said that both Baca and Tanaka do not object to the new probes: "Don't forget this has been looked at by the feds and they said nothing was wrong."

jack.leonard@latimes.com

robert.faturechi@latimes.com

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North Korea Is Suspected of Conducting 3rd Nuclear Test

Lee Jin-Man/Associated Press

A South Korean watched news reporting about a possible nuclear test conducted by North Korea on a TV screen in Seoul on Tuesday.

WASHINGTON — American and South Korean officials reported seismic activity in North Korea on Tuesday that appeared to be evidence of the country’s third, and long-threatened nuclear test and a new challenge for the Obama administration in its effort to keep the country from becoming a full-fledged nuclear power.

“We believe that North Korea has conducted a nuclear test,” said Kim Min-seok, spokesman of the South Korean Defense Ministry.

The shock appeared to be centered in the same location where the North conducted tests in 2006 and 2009, and the United States Geological Survey said it was only a kilometer underground, all indications consistent with a nuclear blast.

If confirmed, the test would be the first under the country’s new leader, Kim Jong-un, and an open act of defiance to the Chinese, who urged the young leader not to risk open confrontation by setting off the weapon. Just in the past few days a Chinese newspaper that is often reflective of the government’s thinking said the North must “pay a heavy price” if it proceeded with the test.

But past United Nations Security Council sanctions have not deterred the country from accelerating its missile and nuclear programs. And recent actions, including a successful missile test nearly two months ago that reached as far as the Philippines and sent a washing-machine sized satellite into space have dashed hopes that the country’s Swiss-educated new leader might be willing to focus on economic reform rather than pursuing the path taken by his father and grandfather: open defiance of the country’s adversaries.

The Obama administration has already threatened to take additional action to penalize the North if it conducts a test, through the United Nations. But the fact is that there are few sanctions left to apply against the most unpredictable country in Asia. The only penalty that would truly hurt the North would be a cutoff of oil and other aid from China. And until now, despite issuing warnings, the Chinese have feared instability and chaos in the North more than its growing nuclear and missile capability, and the Chinese leadership has refused to participate in sanctions.

Mr. Kim, believed to be about 29, appears betting that even a third test would not change the Chinese calculus.

It may take days or weeks to determine if the test, if that is what it proves to be, was successful. But American officials will also be looking for signs of whether the North, for the first time, conducted a test of a uranium weapon, based on a uranium enrichment capability it has been pursuing for a decade. The past two tests used plutonium, reprocessed from one of the country’s now-defunct nuclear reactors. While the country only has enough plutonium for a half-dozen or so bombs, it can produce enriched uranium well into the future.

No country is more interested in the results of the North’s nuclear program, or the Western reaction, than Iran, which is pursuing its own uranium enrichment program. The two countries have long cooperated on missile technology, and many intelligence officials believe they share nuclear knowledge as well, though so far there is no hard evidence. The Iranians are also pursuing uranium enrichment, and one senior American official said two weeks ago that “it’s very possible that the North Koreans are testing for two countries.” Some believe that the country may have been planning two simultaneous tests, but it could take time to sort out the data.

The timing of the test, if that is what it was, is critical. It comes just as a transition of power is about to take place in South Korea, and the North detested the South’s hard-line outgoing president, Lee Myung-bak. By conducting a test just before he leaves office, the North could be both sending a message and giving his successor, Park Guen-Hye, the chance to restore relations after the breach a test will undoubtedly cause.

Western officials considered the country’s first nuclear test, in 2006, a fizzle, but the next one in 2009 was judged more successful. It may take outside experts days or weeks to determine if the latest blast moved the program to a “higher level,” as Pyongyang recently promised, allowing it to improve, or even expand, an arsenal that intelligence experts say includes enough plutonium for roughly 6 to 10 nuclear bombs.

David E. Sanger reported from Washington, and Choe Sang-hun reported from Seoul, South Korea.

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It's a Girl for John Cho

Mom & Babies
Celebrity Baby Blog

02/11/2013 at 06:30 PM ET

Paul Drinkwater/NBC

Surprise: Actor John Cho is a dad again!

The Go On star and his wife welcomed a daughter recently, Cho’s rep confirms to PEOPLE exclusively.

Baby girl is the second child for the couple, who are also parents to a son. No further details are available.

Cho currently stars alongside Jason Bateman in Identity Thief and will reprise his role as Hikaru Sulu in Star Trek Into Darkness in May.

He is also well known for his roles in American Pie and the Harold and Kumar films.

– Anya Leon with reporting by Julie Jordan

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Pope shows lifetime jobs aren't always for life

The world seems surprised that an 85-year-old globe-trotting pope who just started tweeting wants to resign, but should it be? Maybe what should be surprising is that more leaders his age do not, considering the toll aging takes on bodies and minds amid a culture of constant communication and change.

There may be more behind the story of why Pope Benedict XVI decided to leave a job normally held for life. But the pontiff made it about age. He said the job called for "both strength of mind and body" and said his was deteriorating. He spoke of "today's world, subject to so many rapid changes," implying a difficulty keeping up despite his recent debut on Twitter.

"This seemed to me a very brave, courageous decision," especially because older people often don't recognize their own decline, said Dr. Seth Landefeld, an expert on aging and chairman of medicine at the University of Alabama at Birmingham.

Age has driven many leaders from jobs that used to be for life — Supreme Court justices, monarchs and other heads of state. As lifetimes expand, the woes of old age are catching up with more in seats of power. Some are choosing to step down rather than suffer long declines and disabilities as the pope's last predecessor did.

Since 1955, only one U.S. Supreme Court justice — Chief Justice William Rehnquist — has died in office. Twenty-one others chose to retire, the most recent being John Paul Stevens, who stepped down in 2010 at age 90.

When Thurgood Marshall stepped down in 1991 at the age of 82, citing health reasons, the Supreme Court justice's answer was blunt: "What's wrong with me? I'm old. I'm getting old and falling apart."

One in 5 U.S. senators is 70 or older, and some have retired rather than seek new terms, such as Hawaii's Daniel Akaka, who left office in January at age 88.

The Netherlands' Queen Beatrix, who just turned 75, recently said she will pass the crown to a son and put the country "in the hands of a new generation."

In Germany, where the pope was born, Chancellor Angela Merkel, who is 58, said the pope's decision that he was no longer fit for the job "earns my very highest respect."

"In our time of ever-lengthening life, many people will be able to understand how the pope as well has to deal with the burdens of aging," she told reporters in Berlin.

Experts on aging agreed.

"People's mental capacities in their 80s and 90s aren't what they were in their 40s and 50s. Their short-term memory is often not as good, their ability to think quickly on their feet, to execute decisions is often not as good," Landefeld said. Change is tougher to handle with age, and leaders like popes and presidents face "extraordinary demands that would tax anybody's physical and mental stamina."

Dr. Barbara Messinger-Rapport, geriatrics chief at the Cleveland Clinic, noted that half of people 85 and older in developed countries have some dementia, usually Alzheimer's. Even without such a disease, "it takes longer to make decisions, it takes longer to learn new things," she said.

But that's far from universal, said Dr. Thomas Perls, an expert on aging at Boston University and director of the New England Centenarians Study.

"Usually a man who is entirely healthy in his early 80s has demonstrated his survival prowess" and can live much longer, he said. People of privilege have better odds because they have access to good food and health care, and tend to lead clean lives.

"Even in the 1500s and 1600s there were popes in their 80s. It's remarkable. That would be today's centenarians," Perls said.

Arizona Sen. John McCain turned 71 while running for president in 2007. Had he won, he would have been the oldest person elected to a first term as president. Ronald Reagan was days away from turning 70 when he started his first term as president in 1981; he won re-election in 1984. Vice President Joe Biden just turned 70.

In the U.S. Senate, where seniority is rewarded and revered, South Carolina's Strom Thurmond didn't retire until age 100 in 2002. Sen. Robert Byrd of West Virginia was the longest-serving senator when he died in office at 92 in 2010.

Now the oldest U.S. senator is 89-year-old Frank Lautenberg of New Jersey. The oldest congressman is Ralph Hall of Texas who turns 90 in May.

The legendary Alan Greenspan was about to turn 80 when he retired as chairman of the Federal Reserve in 2006; he still works as a consultant.

Elsewhere around the world, Cuba's Fidel Castro — one of the world's longest serving heads of state — stepped down in 2006 at age 79 due to an intestinal illness that nearly killed him, handing power to his younger brother Raul. But the island is an example of aged leaders pushing on well into their dotage. Raul Castro now is 81 and his two top lieutenants are also octogenarians. Later this month, he is expected to be named to a new, five-year term as president.

Other leaders who are still working:

—England's Queen Elizabeth, 86.

—Abdullah bin Abd al-Aziz al-Saud, king of Saudi Arabia, 88.

—Sabah al-Ahmad al-Jaber al-Sabah, emir of Kuwait, 83.

—Ruth Bader Ginsburg, U.S. Supreme Court associate justice, 79.

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Associated Press writers Paul Haven in Havana, Cuba; David Rising in Berlin; Seth Borenstein, Mark Sherman and Matt Yancey in Washington, and researcher Judy Ausuebel in New York contributed to this report.

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Marilynn Marchione can be followed at http://twitter.com/MMarchioneAP

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