U.S. Marines with 8th Engineer Support Battalion pair up to flip tires during a squad competition at Canon Air Defense Complex, Yuma, Ariz., Oct. 24, 2016. Squad competitions happen among every squadron throughout the Marine Corps to build camaraderie and foster good-spirited competition between the separate elements that make up the unit. (U.S. Marine Corps photo taken by Cpl. Summer Romero/ Released)