an other german sub was sunk in a US east coast harbor too, or maybe just near (25 or so miles off shore) not one of the really big ones (ie, not NY or Boston..) it might have been near the naval shipyard in Mystic CT, where they still make submarines..or was it one of the carolina's.. (i don't really remember...)

it, like the attack on alaska and oregon where keep under a news black out during the war.