Staff Sgt. Thomas R. Monahan, Company Armorer, 4th Force Reconnaissance Company, 4th Marine Division, Marine Forces Reserve, explains the characteristics of the rifles on display to Navy and flag officers in Alameda, California June 2, 2015. Marines welcomed foreign military attachés and their spouses, as well as members of the defense foreign liaison office, to a static display of vehicles, weapons and gear used by force reconnaissance Marines, during the attachés' regional tour. (U.S. Marine photo by Cpl. Ian Ferro)