An unidentified US submarine torpedoed and sunk the IRIS Dena, an Iranian Navy frigate, off the coast of Sri Lanka on Tuesday.
Since 1991, Navy subs have launched scores of cruise missiles in combat, but the torpedo attack off Sri Lanka is a return to form after 80 years.
A US submarine this week torpedoing an Iranian warship during the Middle East conflict raised the crucial question of ...
The U.S. Navy has reached a Cold War-era milestone in the Arctic, deploying two Virginia-class submarines beneath the polar ice cap for the 100th time since World War II.