Airman 1st Class Nicholas Russell, 94th Aircraft Maintenance Unit F-22A Raptor crew chief signals to an F-22 Raptor they are clear for take-off, Langley Air Force Base, Va., Feb. 27, 2011. Part of a two -day exercise, Langley Airmen from the 633d Air Base Wing, 1st Fighter Wing and 192nd Fighter Wing worked together to practice deploying people, equipment and aircraft for contingency operations on a moment's notice. (US Air Force photo by Airman 1st Class Camilla Elizeu/Released)