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U.S. officials say there's no need for alarm over reports from Brazil out Friday that active Zika virus has been found in saliva and urine samples. Mosquitoes remain the primary source of Zika, and there's no proof that saliva and urine can transmit the virus, even if it is present there. Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, talks with Mary Louise Kelly about how the Zika virus may spread.

The decision by Hillary Clinton to use a private email server as secretary of state has spawned an FBI investigation, multiple congressional inquiries and dozens of private lawsuits that demand copies of her messages. It's also become an issue in her bid for the Democratic presidential nomination.

Republicans on the campaign trail have raised the prospect that Clinton could be charged with a crime — even as she downplays the FBI probe and asserts she wants voters to be able to see all of her messages from that time.

BMX rider Dave Mirra, who for years dominated his sport even as he helped others embrace it, has died at age 41. Police in Greenville, N.C., say they found Mirra "sitting in a truck with an apparent self-inflicted gunshot wound."

Police found Mirra in a parked vehicle shortly after he had visited friends in Greenville, where he had lived for years as an active member of the community. Mirra is survived by his wife and two daughters.

The New York City Fire Department says a crane collapse early Friday in Manhattan's Tribeca neighborhood killed at least one person, seriously injured two others and left another with minor injuries.

The Associated Press reported that the person killed was a Wall Street worker sitting in a parked car.

Fire officials tweeted that they sent more than 140 fire and emergency medical services personnel from more than 40 units to the scene at the intersection of Worth Street and West Broadway.

Before they got down to debating the big issues Thursday night, Hillary Clinton and Bernie Sanders wrangled over one big word: progressivism.

Which of them was the true progressive? Was Clinton a progressive at all?

Sanders has long billed himself as a progressive, also describing himself as a "democratic socialist." He has not been known for flirting with the term "moderate." But Clinton has at times willingly chosen the latter label.

The U.S. economy added just 151,000 jobs in January while unemployment dropped slightly, to 4.9 percent, according to the latest figures from the Bureau of Labor Statistics.

Economists had expected to see about 190,000 new jobs.

The unemployment rate, which has held steady at 5 percent the past few months, dropped slightly to 4.9 percent. It's the first time unemployment has fallen below 5 percent since the recession.

The pope and the head of the Russian Orthodox Church will meet next week in Cuba for a two-hour session that the Vatican and the Moscow Patriarchate say would be "the first in history" — the churches split in the Great Schism of 1054.

The historic meeting between Pope Francis and Patriarch Kirill is set for Feb. 12. It's the result of an "intersection of the itineraries" as both leaders will be visiting Latin America next week, the Russian Orthodox Church says.

The fifth debate between Hillary Clinton and Bernie Sanders was their first appearance as a duet, and that helped to highlight some of their harmony – even as it heightened their crescendos of dissonance.

With Martin O'Malley having suspended his campaign earlier in the week, the two remaining rivals for the Democratic presidential nomination met in New Hampshire on Thursday night — on stage together for nearly two hours.

"I happen to respect the secretary very much; I hope it's mutual," said Sanders.

And Clinton reciprocated:

WikiLeaks founder Julian Assange has been "arbitrarily detained" by Sweden and the U.K., a U.N. panel has ruled, adding that Assange should be freed and compensated for his treatment.

Sunday's Super Bowl 50 — Carolina Panthers versus the Denver Broncos — could mark the end of an era.

Peyton Manning's last game.

The veteran Broncos quarterback turns 40 next month. After a season plagued by injury and poor play, many suggested it was time to retire. Manning fueled speculation about his future after Denver won the AFC Championship game and microphones heard him tell New England head coach Bill Belichick, "This may be my last rodeo."

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