U.S. Marines assigned to Marine Heavy Helicopter Squadron (HMH) 366 perform maintenance on a CH-53E Super Stallion in preparation for an external lift training exercise on Marine Corps Air Station Cherry Point, N.C., Jan. 7, 2015. The training consisted of CH-53E Super Stallions and landing support Marines rehearsing the insertion and extraction of cargo through air support. (U.S. Marine Corps photo by Lance Cpl. Jodson B. Graves/Released)