Complete the sentence about Soviet atomic bomb project with the correct year: On 29 August ______, the Soviet Union secretly conducted its first weapon test, RDS-1, at the Semipalatinsk Test Site of the Kazakh SSR.

Answer and explanation

Correct answer: D. 1949

On 29 August 1949 the Soviet Union secretly carried out its first weapon test, RDS-1, at the Semipalatinsk site.

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