An expended .50 Caliber casing falls through the hatch of a vehicle as a paratrooper assigned to Delaware Company, 1st Battalion (Airborne), 501st Infantry Regiment, 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division, U.S. Army Alaska, fires on a simulated enemy position during a heavy weapons live-fire with M2 .50 Cal. machine guns, and MK-19 grenade machine guns on Joint Base Elmendorf-Richardson, Friday, April 24, 2015. U.S. Army Alaska is home to the Army’s only Pacific airborne brigade combat team, and maintains the only airborne rapid-response capacity within the Pacific Command. (U.S. Air Force photo/Justin Connaher)