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RDS-4 (also known as ''Tatyana'') was a Soviet nuclear bomb. It was the Soviet Union's first mass-produced tactical nuclear weapon. It used a plutonium implosion assembly and had a nominal yield of 30 kilotons. The bomb was delivered from a Tu-4 and Tu-16 aircraft.〔 It was first tested at Semipalatinsk Test Site, on August 23, 1953. The bomb was dropped from an IL-28 aircraft at an altitude of 11 km and exploded at 600 m, with a yield of 28 kt.〔〔 RDS-4 was also used on September 14, 1954 during Snowball military exercise near Totskoye (similar to Western Desert Rock exercises), when the bomb was dropped by the Tu-4 bomber (the copy of American B-29 bomber). The purpose of this exercise was not to test the bomb itself, but the ability of using it while breaking through enemy defenses (presumably in West Germany). After the explosion Soviet jet fighters were sent to fly through the mushroom cloud itself while tanks and infantry were forced to move through ground zero. Medical records of contaminated soldiers were forged afterwards and many were forced out of active duty. ==See also== *Nuclear weapons program of the Soviet Union *Soviet atomic bomb project *RDS-2 *RDS-3 *RDS-4 *RDS-5 *RDS-37 *RDS-220 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「RDS-4」の詳細全文を読む スポンサード リンク
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