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U.S. Air Force Staff Sgt. Seth Calkins, a crew chief from the 393rd Aircraft Maintenance Unit, waits for a B-2 Spirit to taxi across the runway while deployed to an undisclosed location in the U.S. Pacific Command area of operations March 10 2016. U.S. Strategic Command routinely demonstrates its capability to command, control and conduct global bomber missions. (U.S. Air Force photo by Senior Airman Joel Pfiester/Released)