U.S. Marine Kevin Kobell carries a rubber M-16 training rifle. U.S. Marine Kevin Kobell carries a rubber M-16 training rifle as he makes his way across a swimming pool during his water survival qualification test at Marine Corps Air Station Miramar, Calif., on Sept. 6, 2007. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 026298-W-WSG68-063.jpg Photo Gallery