Invisible Children's "Kony 2012" video about Central African warlord Joseph Kony went viral earlier this year but is seen as a cautionary tale by some social media experts. Here, the group's co-founders, Jason Russell, Bobby Bailey and Laren Poole, record footage in Africa in 2007.
Hours after Facebook put out a call Tuesday for its users to register as organ donors, 6,000 people had already signed up. That's more than 15 times the number of people who normally register each day, according to Donate Life America, which is collaborating with Facebook.
Dominique Strauss-Kahn, the former chief at the International Monetary Fund, is facing more allegations of sexual misconduct.
Strauss-Kahn was considered a top contender for the French presidency until he was accused of rape by a New York City hotel maid. That case against him was dropped, but it cost him his IMF job and then French investigators implicated Strauss-Kahn in a prostitution probe.