U.S. Marines with Special Purpose Marine Air-Ground Task Force 24 sit in the back of an amphibious assault vehicle before conducting an amphibious assault rehearsal with Marines from 3rd Assault Amphibian Battalion on a beach in Salinas, Peru, on July 11, 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.