U.S. Marine Corps Lance Cpl. Timothy L. Greene, rifleman,

U.S. Marine Corps Lance Cpl. Timothy L. Greene, rifleman, Bravo Company, 1st Battalion, 6th Marine Regiment, 2nd Marine Division (MARDIV), shoots an azimuth on his compass as his fire team searches for a check point in a day land navigation class, during basic mountain training, Marine Corps Mountain Warfare Training Center, Bridgeport, Calif., Sept. 10, 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)