<P> The Mk / B53 was a high - yield bunker buster thermonuclear weapon developed by the United States during the Cold War . Deployed on Strategic Air Command bombers , the B53 , with a yield of 9 megatons , was the most powerful weapon in the U.S. nuclear arsenal after the last B41 nuclear bombs were retired in 1976 . </P>
<P> The Mk / B53 was a high - yield bunker buster thermonuclear weapon developed by the United States during the Cold War . Deployed on Strategic Air Command bombers , the B53 , with a yield of 9 megatons , was the most powerful weapon in the U.S. nuclear arsenal after the last B41 nuclear bombs were retired in 1976 . </P>
what is the largest nuclear bomb america has
what is the largest nuclear bomb america has
Mk / B53
Mk / B53