U.S. Navy Petty Officer 1st Class Lee Cortez, assigned to U.S. Naval Hospital Guam, takes water samples at a local well to determine pH levels, Peleliu, Palau, July 27, 2010. U.S. Navy Petty Officer 1st Class Lee Cortez, assigned to U.S. Naval Hospital Guam, takes water samples at a local well to determine pH levels, Peleliu, Palau, July 27, 2010. SHARE: Download: Full Size (1.86 MB) Tags: photo essays Credit: VIRIN: 928993-Q-XUN04-070.jpg Photo Gallery