Louder Marine Corps Sgt. Preston T. Brown instructs a recruit to respond louder at Marine Corps Recruit Depot in San Diego, Dec. 18, 2015. Annually, the depot trains more than 17,000 males recruited from the western recruiting region. U.S. Marine Corps photo by Sgt. Tyler Viglione SHARE: Download: Full Size (0.56 MB) Credit: Sgt. Tyler Viglione VIRIN: 151218-D-LP538-007.JPG Photo Gallery