U.S. Marines with Kilo Battery, 2nd Battalion 10th Marines load a High Explosive round into a M777 Howitzer during the Tactical Air Control Party (TACP) course of live fire for the Expeditionary Warfare Training Group, Atlantic aboard Camp Lejeune, N.C., June 24, 2014. TACP course incorporates the concepts and principles used in implementing air power in support of Marine Air-Ground Task Force or Joint Task Force operations. (U.S. Marine Corps photo by Cpl. Michael Oxton, Combat Camera, MCI-East, Camp Lejeune/Released)