U.S. Marine Corps Gunnery Sgt. Sims, right, with 4th Platoon, Company C, 3rd Assault Amphibian Battalion, 1st Marine Division, reads a promotion warrant for Lance Cpl. David E. Mahaffey, left, who is being promoted to corporal on a beach in Ancon, Peru, the morning after their units initial launch off of the amphibious transport dock USS New Orleans on July 4. The unit is embarked on the transport dock ship USS New Orleans in support of operation Partnership of the Americas/Southern Exchange, a combined amphibious exercise designed to enhance cooperative partnerships with maritime forces from Argentina, Mexico, Peru, Brazil, Uruguay and Colombia. (U.S. Marine Photo photo by Cpl Brian J. Slaght/Released)