 Ramba uchiverenga ndima ino - Muna 1967, Coast Guard yakatamiswa kubva kuU.S. Department of the Treasury kuenda kuU.S. Department of Transportation yakanga ichangobva kuumbwa, urongwa hwakagara kusvikira hwaiswa pasi peU.S. Department of Homeland Security muna 2003 sechikamu chemitemo yakagadzirirwa kudzivirira zvinobudirira zvido zveAmerica zvichitevera kurwiswa nemagandanga kwaSeptember 11, 2001. 