A C-17 Globemaster III takes off from an airfield on the Nevada Test and Training Range near Nellis Air Force Base during the Mobility Air Forces Exercise Nov. 18, 2009. The C-17 is participating in the exercise which provides realistic training for combat air forces, mobility air forces and U.S. Army Soldiers. (U.S. Air Force photo/Airman 1st Class Brett Clashman)