Marines with U.S. Marine Corps Forces Special Operations Command complete a fast rope and rappelling course on Landing Zone Parrot at Marine Corps Base Camp Lejeune, N.C., July 20, 2016. The exercise was a part of a two weeklong Helicopter Insertion and Extraction Techniques Course. The CH-53 provided for the training evolution was assigned to Marine Heavy Helicopter Squadron 461, 2nd Marine Aircraft Wing. (U.S. Marine Corps photo by Lance Cpl. Mackenzie Gibson/Released) - Marines with U.S. Marine Corps Forces Special Operations Command complete a fast rope and rappelling course on Landing Zone Parrot at Marine Corps Base Camp Lejeune, N.C., July 20, 2016. The exercise was a part of a two weeklong Helicopter Insertion and Extraction Techniques Course. The CH-53 provided for the training evolution was assigned to Marine Heavy Helicopter Squadron 461, 2nd Marine Aircraft Wing. (U.S. Marine Corps photo by Lance Cpl. Mackenzie Gibson/Released)