U.S. airmen assigned to the Missouri Air National Guard's

U.S. airmen assigned to the Missouri Air National Guard's 139th Security Forces Squadron participate in a training exercise involving airdrop support by a C-130 Hercules aircraft at Rosecrans Air National Guard base, Mo., July 17, 2013. U.S. Air Force Gen. Paul J. Selva, commander of Air Mobility Command (AMC), and Chief Master Sgt. Richard A. Kaiser, AMC command chief, observed the training exercise during a visit to Rosecrans and were briefed about 139th operations and the Advanced Airlift Tactics Training Center. (U.S. Air National Guard photo by Tech. Sgt. Michael Crane)