Marines with Marine Wing Support Squadron 371 prepare for a perimeter sweep foot patrol during the security force exercise in support of pre-deployment training Dec. 7-10, 2014, at the Auxiliary Landing Field II on Marine Corps Air Station Yuma, Ariz. The exercise provided Marines a hands-on experience for installation night and day security operations. (U.S. Marine Corps photo by Cpl. Reba James/ Released) - Marines with Marine Wing Support Squadron 371 prepare for a perimeter sweep foot patrol during the security force exercise in support of pre-deployment training Dec. 7-10, 2014, at the Auxiliary Landing Field II on Marine Corps Air Station Yuma, Ariz. The exercise provided Marines a hands-on experience for installation night and day security operations. (U.S. Marine Corps photo by Cpl. Reba James/ Released)