Pakistani flood survivors wait to board a U.S. military transport helicopter to evacuate the Kalam Valley on Monday. Farooq Naeem/AFP/Getty Images hide caption

itoggle caption Farooq Naeem/AFP/Getty Images

President Obama meets with Palestinian President Mahmoud Abbas at the White House in June. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Cambodian farmer Leang Korn, 56, cries in front of a portrait of her nephew, who was a prisoner of the Khmer Rouge's Tuol Sleng prison, now turned into a genocide museum, in Phnom Penh, Cambodia. Heng Sinith/AP hide caption

itoggle caption Heng Sinith/AP

U.S. Marines take cover as they are involved in a gun battle in March during a patrol in Marjah, Afghanistan. In February, U.S.-led troops set out to rid the area of insurgents and set up a viable local government. But Taliban militants have returned to the area. Dusan Vranic/AP hide caption

itoggle caption Dusan Vranic/AP