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The Tupolev Tu-4 (NATO designation "Bull") was the Soviet Union's first strategic bomber capable of reaching the continental United States. It was developed by the Tupolev design bureau and first flew in 1947. The Tu-4 was essentially a reverse-engineered copy of the American Boeing B-29 Superfortress, three of which had made emergency landings in the Soviet Far East.12

This aircraft served as the USSR's principal strategic bomber until the mid-1950s. It was powered by four piston engines and carried a crew of eleven. Its offensive capability included the capacity to carry two nuclear bombs or up to 9,000 kg (20,000 pounds) of conventional bombs. The Tu-4 was later superseded by jet bombers such as the Myasishchev M-4 and the Tupolev Tu-95.13

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