A mortarman with Fox Company, 2nd Battalion, 3rd Marine Regiment, prepares to load an 81 mm mortar tube to provide supporting fire for the infantry platoons taking out simulated enemy targets, Sept. 11, 2013, as part of the air assault course at Marine Corps Air Ground Combat Center Twentynine Palms, Calif. The AAC is part of the month-long Integrated Training Exercise. (U.S. Marine Corps photo by Cpl. Sarah Dietz) - A mortarman with Fox Company, 2nd Battalion, 3rd Marine Regiment, prepares to load an 81 mm mortar tube to provide supporting fire for the infantry platoons taking out simulated enemy targets, Sept. 11, 2013, as part of the air assault course at Marine Corps Air Ground Combat Center Twentynine Palms, Calif. The AAC is part of the month-long Integrated Training Exercise. (U.S. Marine Corps photo by Cpl. Sarah Dietz)