U.S. Marine Corps Sgt. Jordan K. Heiselman, second

U.S. Marine Corps Sgt. Jordan K. Heiselman, second from right, platoon sergeant, Weapons Platoon, Alpha Company, 1st Battalion, 6th Marine Regiment (1/6), 2nd Marine Division (MARDIV), former Marine Corps Mountain Warfare Training Center (MCMWTC) instructor, mans a rappel rope aiding Cpl. Evan S. Willis, rifleman, also with Alpha Company, 1/6, MARDIV, as Willis prepares to descend down a cliff face, during basic mountain training, MCMWTC, Bridgeport, Calif., Sept. 16, 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)