Staff Sgt. Alex Garviria, 721st Communication Squadron senior systems controller, and 2nd Lt. Rachel James, 721st CS crew commander, work in the Global Strategic Warning and Space Surveillance System Center at Cheyenne Mountain Air Force Station, Colo., Sept. 2, 2014. The 721st CS provides continuous monitoring of strategic missile warning systems to ensure constant dataflow of key information to National Command Authorities, North American Aerospace Defense Command, U.S. Northern Command, U.S. Strategic Command, Air Force Space Command, and strategic and theater commanders. (U.S. Air Force photo by Airman 1st Class Krystal Ardrey)
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