Tags: Weapon.
The RDS-1 (Russian: РДС-1) also known as Izdeliye 501 (article 501) and First Lightning (Первая молния Pervaya molniya)[citation needed] was used in the Soviet Union’s first nuclear weapon test. The United States assigned it the code-name Joe-1 in reference to Joseph Stalin. It was exploded on 29 August 1949 at 7 in the morning at Semipalatinsk Kazakh SSR after a top-secret R&D project.
