U.S. Secretary of Defense Chuck Hagel is greeted by Amb. James B. Cunningham and Gen. Joseph F. Dunford , after arriving on Dec. 7, 2013 in Kabul, Afghanistan. Credit: Mark Wilson/Getty Images Secretary of Defense Hagel in Afghanistan Defense…

World pays tribute to Nelson Mandela Tributes to South Africa's first black president continue, from Harlem to Hollywood and Paris to Beijing. In Johannesburg, South Africans gathered around Mandela's home to commemorate the leader with songs and prayers. Nelson…

Biden in China appeals for restraint Vice President Joe Biden's visit to China comes as regional tensions run high over Beijing's new air defense zone in contested waters of the East China Sea. Biden met with Chinese President Xi…

The Smithsonian National Zoo has named its 100-day-old panda cub "Bao Bao." http://t.co/RrFj6XbBau pic.twitter.com/VrDueRd0Sg— BuzzFeed News (@BuzzFeedNews) December 1, 2013…

Four dead in New York train derailment Wreckage and rescue: Pictures of #MetroNorth train crash in Bronx, New York http://t.co/GWGfOGCv15 pic.twitter.com/IktrXVsZwt— BBC News (World) (@BBCWorld) December 1, 2013 A train heading for Grand…

Death count may rise in Glasgow helicopter crash Late Friday, a police helicopter crashed into a Glasgow pub. According to the AP, 8 people are confirmed dead, including two officers and a civilian pilot. Officials say the count is…

Iranian Foreign Minister Mohammad Javad Zarif speaks to the media Sunday after an interim accord to curb Iran's nuclear powers in return for slightly loosening some economic sanctions had been reached. Creative Commons photo by Eric Bridiers and via…

Deal reached between Iran and the West A deal was reached early Sunday morning in Geneva between Iran and six world powers to curb Tehran's nuclear program in exchange for limited sanctions relief. The agreement hopes to ease…

Iranian flag at (IAEA) in Vienna. Photo credit: DIETER NAGL/AFP/GettyImages. Good morning. Here are some of the top stories we'll be keeping an eye on throughout the day. Iran - Nuclear Secretary of State Kerry has joined the talks…

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