UNICEF Goodwill Ambassador Mia Farrow visits the Dadaab refugee settlement in northern Kenya, where tens of thousands of Somali refugee families have fled — escaping conflict, drought and famine back home. Kate Holt/UNICEF hide caption

Rex Goodnight (right) works with contractors in Afghanistan. His program, Afghanistan Reachback, works to create buildings using the resources Afghans actually have. Courtesy of Rex Goodnight hide caption

Director John Madden works on the set of his espionage thriller The Debt, a remake of a 2007 Israeli film of the same name. Madden says he was initially attracted to the story's complexity. Laurie Sparham/Focus Features hide caption

Online reviews are many, but it's often difficult to tell the real ones from the fakes. To help sort the genuinely delighted customers from profit-driven praise, researchers at Cornell University have developed software that can successfully tell the difference. Yanik Chauvin/iStockphoto hide caption

Imelda May's new album is called Mayhem. Chris Clor hide caption