RIO DE JANIERO, BRAZIL - Lt. j.g. Clifton Harrison, an instructor for the Coast Guard International Training Division, based in Yorktown, Va., is taken down by a Brazilian marine during a training exercise in Rio De Janeiro, Brazil, April 23. The ITD is helping train members of the Brazilian and Argentinean navies in law enforcement tactics during in this years UNITAS, Atlantic phase. UNITAS is a multinational exercise that helps test the interoperability of U.S. and foreign navies. U.S. Coast Guard photo by Public Affairs Specialist 2nd Class Nathan Henise.