Alan Nunn May (May 2, 1911 — January 12, 2003) was a British atomic scientist and a spy who supplied secrets of British and American atomic bomb research to the Soviets during the Manhattan project. May 2 is the 122nd day of the year in the Gregorian calendar (123rd in leap years). ... 1911 is a common year starting on Sunday (click on link for calendar). ... January 12 is the 12th day of the year in the Gregorian Calendar. ... 2003 is a common year starting on Wednesday of the Gregorian calendar. ... Espionage is the practice of obtaining secrets (spying) from rivals or enemies for military, political, or economic advantage. ... The mushroom cloud of the atomic bombing of Nagasaki, Japan, 1945, rose some 18 km (11 mi) above the epicenter. ... The Union of Soviet Socialist Republics (USSR) (Russian: (СССР)   listen?; tr. ... Control panels and operators for calutrons at the Y-12 Plant in Oak Ridge, Tennessee. ...

He joined the Communist Party in the 1930s. He was unmasked as a spy in Canada and faced trial in 1946. In modern usage, a Communist party is a political party which promotes Communism, a sociopolitical philosophy based on the particular interpretation of Marxism put forth by Vladimir Lenin. ... // Events and trends The 1930s were spent struggling for a solution to the global depression. ... 1946 was a common year starting on Tuesday. ...

He was exposed when the Canadian Soviet cipher clerk Igor Gouzenko defected, and while not immediately arrested, he was ultimately charged under Britain's Official Secrets Act. He was sentenced to ten years hard labor, of which he served six. Gouzenko wearing his white hood for anonymity Igor Gouzenko (January 13, 1919–1982) was a cipher clerk for the Soviet Embassy to Canada in Ottawa, Ontario. ... The phrase official secrets act may also be used to refer to statutes of a similar nature in other countries. ...

Damage inflicted by Nunn May’s espionage was not on level with that of Klaus Fuchs, nor that alleged to have been inflected by Julius and Ethel Rosenberg, and was over less time, but was the first such case to be discovered, and revealed weaknesses in British and American security. Emil Julius Klaus Fuchs (b. ... The Rosenbergs Ethel Greenglass Rosenberg (1915-1953) and Julius Rosenberg (1918-1953) were American Communists who captured and maintained world attention after being tried, convicted, and executed for spying for the Soviet Union. ...

See also:

• Cold War espionage
• Julius and Ethel Rosenberg
• Manhattan project
• Soviet atomic bomb project

After the end of WWII, American intelligence efforts turned to the Soviet Union. ... The Rosenbergs Ethel Greenglass Rosenberg (1915-1953) and Julius Rosenberg (1918-1953) were American Communists who captured and maintained world attention after being tried, convicted, and executed for spying for the Soviet Union. ... Control panels and operators for calutrons at the Y-12 Plant in Oak Ridge, Tennessee. ... The Soviet project to develop an atomic bomb began during World War II in the Soviet Union. ...

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