U.S. Marine Corps Cpl. Justen Petet, 81 mm mortar forward

U.S. Marine Corps Cpl. Justen Petet, 81 mm mortar forward observer, Company C, 1st Battalion, 7th Marine Regiment, annotates grid coordinates while conducting fire integration support team (FiST) exercise as a part of Large Scale Exercise (LSE) at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Aug. 16, 2015. LSE is a joint forces exercise conducted at the brigade level designed to enable live, virtual, and constructive training for participating units and allows participating nations to strengthen partnerships and their ability to operate together. (U.S. Marine Corps photo by Lance Cpl. Clarence A. Leake/Released)