Pakistani men throw a bag of flour onto a pile behind a U.S. Army CH-47 Chinook helicopter. Pakistani men throw a bag of flour onto a pile behind a U.S. Army CH-47 Chinook helicopter that arrived to deliver humanitarian assistance and help with the evacuation of flood victims in the Swat Valley of Pakistan during the flood disaster recovery effort in Khyber Pakhtunkhwa province on Aug. 11, 2010. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 361307-V-AVY77-699.jpg Photo Gallery