Soviet::atomic    Weapon::nuclear    First::category    Title::union    Peslyak::design    Truman::nuclear

{{#invoke:Coordinates|coord}}{{#coordinates:50|26|15|N|77|48|51|E| |primary |name= }} {{#invoke:Infobox|infobox}} The RDS-1 (Russian: РДС-1{{#invoke:Category handler|main}}), also known as Izdeliye 501 (device 501) and First Lightning (Первая молния{{#invoke:Category handler|main}}, Pervaya molniya){{ safesubst:#invoke:Unsubst||date=__DATE__ |$B= {{#invoke:Category handler|main}}{{#invoke:Category handler|main}}[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 7:00 AM,<ref name=Theplace>{{#invoke:citation/CS1|citation |CitationClass=news }}</ref> at Semipalatinsk, Kazakh SSR, after a top-secret R&D project.<ref name="Peslyak">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

RDS-1 sections
Intro  Description  Response in the West  See also   References    External links   

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