Sleek, black and rarely seen, submarines are the ultimate killing machine. Prowling the decks, their torpedoes can threaten any ship at sea, their missiles, any .\r<br>\r<br>Cold War Submarines.\r<br>\r<br>\r<br>\r<br>\r<br>\r<br>RUSSIA UNDERGROUND SECRET SUBMARINE BASE LEAKED and EXPOSED. Did President Putin want control of Crimea for the Secret Underground .
