U.S. Marine Corps Staff Sgt. Paul Osborn, bottom, with Delta Company, 3rd Assault Amphibian Battalion, checks a headset for communication on a amphibious assault vehicle during exercise Dawn Blitz aboard Camp Pendleton, Calif., June 19, 2013. Dawn Blitz 2013 is a multinational amphibious exercise off the Southern California coast that refocuses Navy and Marine Corps and coalition forces in their ability to conduct complex amphibious operations essential for global crisis response across the range of military operations. (U.S. Marine Corps photo by Skyler E. Treverrow, 1st Marine Division, Combat Camera/Released)