Two U.S. Air Force C-130 Hercules crew chiefs conduct a post flight inspection of their aircraft at Nellis Air Force Base, Nev., Nov. 18, 2009. The crew and aircraft participated in the bi-annual, U.S. Air Force Weapons School exercise which provides realistic training for combat Air Force, mobility Air Force and U.S. Army personnel. Approximately 40 C-17 and C-130 aircraft from Air Force bases around the world flew approximately 400 Soldiers from Fort Bragg, N.C., for airdrops on the Nevada Test and Training Range. The exercise also allows Soldiers the opportunity to use range facilities to conduct urban ground operations training. (U.S. Air Force photo by Lawrence Crespo/Released)

Two U.S. Air Force C-130 Hercules crew chiefs conduct a post flight inspection of their aircraft at Nellis Air Force Base, Nev., Nov. 18, 2009. The crew and aircraft participated in the bi-annual, U.S. Air Force Weapons School exercise which provides realistic training for combat Air Force, mobility Air Force and U.S. Army personnel. Approximately 40 C-17 and C-130 aircraft from Air Force bases around the world flew approximately 400 Soldiers from Fort Bragg, N.C., for airdrops on the Nevada Test and Training Range. The exercise also allows Soldiers the opportunity to use range facilities to conduct urban ground operations training. (U.S. Air Force photo by Lawrence Crespo/Released)