The deadliest weapons on Earth, ranked

The B-41 hydrogen bomb, first deployed in September 1960, is the most powerful weapon ever created by the US, with a maximum yield of 25 megatons, or equivalent to 25 million tons of TNT. With a lethality index roughly 4,000 times greater than Fat Man, it’s also the most deadly. Thankfully, the thermonuclear device was retired shortly after its creation.

The US’ current most powerful weapon is the B83 bomb, with a yield of “just” 1.2 megatons.

Lethality Index: 210,000,000,000

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