Sailors assigned to the Oliver Hazard Perry-class guided-missile frigate USS Underwood fire the 40 mm saluting battery for a pass-in-review by Rear Adm. Sinclair Harris, commander of the U.S. 4th Fleet, during his approach aboard the guided-missile cruiser USS Anzio (CG 68) the flagship for UNITAS Atlantic 53-2012. UNITAS is a combined South America- and U.S. 4th Fleet-sponsored annual exercise that incorporates participants from Brazil, Canada, Colombia, Dominican Republic, Mexico, and the United Kingdom and the United States. (U.S. Navy photo by Mass Communication Specialist 2nd Class Stuart Phillips)