MARINE CORPS AIR STATION YUMA, Ariz. -- U.S. Marines with Marine Air Control Squadron (MACS) 1 conduct Crew-Served Weapons Handling Training at Marine Corps Air Station Yuma Ariz., May 29, 2019. The purpose of this training is to ensure that Marines are familiar with the handling and operations of the M240B machine gun. (U.S. Marine Corps photo by Lance Cpl Joel Soriano)