Player Embed Code: <iframe width='500' height='300' scrolling='no' frameborder='0' style='border: none; overflow: hidden; width: 500px; height: 300px;' allowtransparency='true' src='https://www.dvidshub.net/video/embed/559124'></iframe> Download Embed Share The Nuclear Triad: Submarines Defense.gov Oct. 17, 2017 | 1:01 Ohio-class nuclear submarines are the most survivable leg of the nuclear triad. The other two legs of the triad are bombers and intercontinental ballistic missiles. The triad provides our nation with significant deterrence and decisive response capabilities.