Col. Jeffrey K. Barnson, (from left), 452nd Air Mobility Wing vice commander; Lt. Col. Mark Wittemann, chief of wing standardization/evaluation; and Lt. Col. Darrell Bredehoeft, 452nd Mission Support Group commander, take a closer look at the trap area underneath one of the barriers of the DCS501 system at March Air Reserve Base, Calif. (U.S. Air Force photo/Will Alexander)
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