Marines with Golf Battery, 2nd Battalion, 10th Marine Regiment, 2nd Marine Division, fire 120 mm high explosive mortar rounds from an Expeditionary Fire Support System during Exercise Rolling Thunder 2-15 aboard Fort Bragg, N.C., March 9, 2015. The purpose of Exercise Rolling Thunder is to exercise, access and improve the regiment's ability to shoot, move and communicate in a field environment while demonstrating to supported commanders the capabilities and effects the regiment provides to the division and Marine Air Ground Task Force operations. Since the EFSS is a smaller weapon system compared to the M777 Howitzer Cannon, it requires fewer Marines and less gear to operate the weapon. (U.S. Marine Corps photo by Sgt. James R. Smith/Released)