Senior Airman Christopher Townsley, 403rd Aircraft Maintenance Squadron crewchief at Keesler Air Force Base, Mississippi, marshalls in an 815th Airlift Squadron aircrew returning from Saber Junction 16, April 20, 2016. The exercise, which started March 31 and ends April 24, is the U.S. Army’s annual combat training center certification exercise to evaluate the readiness of the 173rd Airborne Brigade. The 815th AS participated in the training event April 5-20, 2016. (U.S. Air Force/Maj. Marnee Losurdo)