U.S. Marine Corps Cpl. Tim G. Brookshire, overhead

U.S. Marine Corps Cpl. Tim G. Brookshire, overhead equipment noncommissioned officer, Headquarters and Service Company, 1st Battalion, 6th Marine Regiment, 2nd Marine Division (MARDIV), puts tack on his pack mule, Arlo, as they prepare to transport crew served weapons to the Forward, during Mountain Exercise 5-15, Marine Corps Mountain Warfare Training Center, Bridgeport, Calif., Sept. 22, 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)