U.S. Marine Corps Cpl. Raymond A. Mabin, crew chief

U.S. Marine Corps Cpl. Raymond A. Mabin, crew chief for a CH-53E Super Stallion, Marine Heavy Helicopter Squadron 465, 3rd Marine Aircraft Wing, takes a head count of the number of Marines with Bravo Company, 1st Battalion, 6th Marine Regiment, 2nd Marine Division (MARDIV), during the conclusion of Mountain Exercise 5-15, Marine Corps Mountain Warfare Training Center, Bridgeport, Calif., Sept. 24, 2015. Marines participate in a month-long field exercise focusing on core mission essential tasks such as assault climbing, animal packing and small unit movements, to strengthen expeditionary high altitude warfare tactics in a mountainous environment against a hybrid threat, as they prepare for world-wide deployment. (U.S. Marine Corps photo by Cpl. Kelly L. Street, 2D MARDIV COMCAM/Released)