Nonstrategic nuclear weapons. The United States has only one type of nonstrategic nuclear weapon in its stockpile: the B61 gravity bomb. But it exists in several versions: the B61–3 and the B61–4 with yields varying from 0.3 kilotons up to 170 and 50 kilotons, respectively, and the new B61–12 entering the stockpile with a yield of up to ... More @Wikipedia
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