Aircrew practice for the Global Strike Challenge

U.S. Air Force Capt. Andrea McElvaine, 93rd Bomb Squadron aircraft commander, and her crew step to their waiting B-52 Stratofortress prior to a sortie on Aug. 21, 2012, Barksdale Air Force Base, La. The crew is practicing for the upcoming Global Strike Challenge, which is the world's premiere bomber, intercontinental ballistic missile and security forces competition with units participating from Air Force Global Strike Command, Air Combat Command, Air Force Material Command, Air Force Reserve Command and the Air National Guard. (U.S. Air Force photo by Master Sgt. Greg Steele/Released)

PHOTO BY: Master Sgt. Greg SteeleReleased
VIRIN: 120821-F-PF761-012.JPG
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