An Iraqi Army Aviation Command, Squadron 21, ground crew member salutes a Bell 407 helicopter at takeoff July 12, 2011 at Taji Air Base, Iraq. Assigned at Taji Air Base, the 721st Air Expeditionary Advisory Squadron trains, advises and assists Iraqi pilots and maintenance personnel, focusing on sustainability, reliability and interoperability. (U.S. Air Force photo/Staff Sgt. Mike Meares)