22nd Special Tactics Squadron combat controllers on the ground pop purple smoke marking the landing zone for their fellow Airmen jumping from a C-17 Globemaster III October 21, 2014, during a training exercise at Joint Base Lewis-McChord, Wash. The Special Tactics Airmen conducted the jump training to maintain proficiency as they prepare for upcoming deployments. (U.S. Air Force photo/SSgt Russ Jackson)
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