Marine Corps Air Station Yuma, Ariz. -- U.S. Marines assigned to Headquarters and Headquarters Squadron and Marine Aircraft Group 13 Corporals courses compete against each other in a grappling match on Marine Corps Air Station Yuma, Jan. 23, 2019. The match was conducted as the Marines morning physical training, as well as an opportunity to boost morale and comradery during a friendly competition. (U.S. Marine Corps photo by Lance Cpl John Hall)