Swapping wrenches for rifles
U.S. Air Force Senior Airman John Warych of the 455th Expeditionary Maintenance Squadron runs to a defensive fighting position during an exercise at Bagram Airfield, Afghanistan, March 13, 2014. Service members periodically participate in drills to keep their base defense skills honed.(U.S. Air Force photo by Senior Master Sgt. Gary J. Rihn/Released)