50-caliber machine gun

U.S. Navy Yeoman 3rd Class Jacob Slay fires a twin .50-caliber machine gun as Information Systems Technician 2nd Class Michael Ervin, left, and Gunner's Mate 2nd Class Joshua Pacheco help him spot his target from aboard the U.S. 7th Fleet command ship USS Blue Ridge (LCC 19) during a live-fire training exercise in the Pacific Ocean April 27, 2010. (DoD photo by Mass Communication Specialist 3rd Class Daniel Viramontes, U.S. Navy/Released)