Worlds Largest Nuclear-Powered Attack Submarine of U.S Navy Army - Full Documentary.\r<br>\r<br>USS Pennsylvania is a United States Navy Ohio-class ballistic missile submarine which has been in commission since 1989. The Ohio class is a class of nuclear .\r<br>\r<br>An interesting documentary on US navy nuclear armed submarines produced by the pentagon channel. Composition of the current force[edit] Ohio class (18 in .\r<br>\r<br>TOP 15 BIGEST WARSHIPS IN THE WORLD 2015 GERALD FORD CLASS AICRAFT CARRIER (USA) 2015 Queen Elizabeth-class aircraft carrier (UK) 2018 .
