A U.S. Marine with 4th Platoon, Charlie Company, 3rd Assault Amphibian Battalion, 1st Marine Division fixes the track of his amphibious assault vehicle on a beach in Ancon, Peru, on July 7, 2010. The Marines are embarked aboard the transport dock ship USS New Orleans (LPD 18) in support of Partnership of the Americas/Southern Exchange, a combined amphibious exercise with maritime forces from Argentina, Mexico, Peru, Brazil, Uruguay and Colombia.