U.S. Marine Corps Lance Cpl. David E. Mahaffey, center, with 4th Platoon, Company C, 3rd Assault Amphibian Battalion, 1st Marine Division, gets pinned on corporal on the July 4 by two of his fellow Marines on a beach in Ancon, Peru, the morning after their units initial launch off of the amphibious transport dock USS New Orleans. 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.