Air Force Security Forces personnel set up a security perimeter around the space shuttle Discovery and NASA's 747 Shuttle Carrier aircraft at Barksdale Air Force Base, La., on Aug. 19, 2005. The 747 and its piggy-backed Discovery stopped for a planned overnight refueling on its way back to Kennedy Space Center, Fla.
U.S. Air Force/Master Sgt. Michael A. Kaplan
Taken on 19 August 2005
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