The U.S. Navy has a fleet of the world's largest submarines in the event of a nuclear attack that keep enemies guessing about where and when ... ... <看更多>

A US nuclear -armed submarine has arrived in South Korea for the first time in more than four decades. The show of force and the Nuclear ... ... <看更多>

ABC News' Martha Raddatz goes on board a U.S. Navy nuclear ballistic missile submarine and explores how the U.S. military is working to ... ... <看更多>

Comments3.4K · Rare access inside US ballistic missile submarine | ABCNL · Living Underwater: How Submarines Work · Life on an aircraft carrier. ... <看更多>