The most powerful weapon in the US nuclear arsenal is the B83 nuclear bomb. Developed in the late 1970s and in use since 1983, the B83 is a variable-yield gravity bomb with unparalleled destructive ...

Introduced in 1960, the American MK41 hydrogen bomb remains the highest-yield nuclear weapon ever placed in active service.

North Korea said Sunday it had tested a hydrogen bomb which it can mount on a missile, declaring "perfect success" in its biggest-ever nuclear detonation. Pyongyang has long sought the means to ...