Marine Corps Capt. David Hirt, left, and Maj. Stephen Piantarnida observe the terrain using night-vision goggles during an air support exercise as part of a weapons and tactics course for instructors at Chocolate Mountain Aerial Gunnery Range, Ariz., April 11, 2017. The training emphasizes operational integration of the six functions of Marine Corps aviation to support a Marine Air Ground Task Force. Marine Corps photo by Cpl. Aaron James Vinculado