U.S. Navy Petty Officer 2nd Class Christian Karsemeyer, right, uses a navy firefighting thermal imager during a main space fire drill aboard the amphibious assault ship USS Boxer in the Pacific Ocean, May 7, 2015. Karsemeyer is a hull technician. U.S. Navy Petty Officer 2nd Class Christian Karsemeyer, right, uses a navy firefighting thermal imager during a main space fire drill aboard the amphibious assault ship USS Boxer in the Pacific Ocean, May 7, 2015. Karsemeyer is a hull technician. SHARE: Download: Full Size (1.74 MB) Tags: photo essays Credit: VIRIN: 494497-L-MAJ02-137.jpg Photo Gallery