On this date in 1953 Ethel and Julius Rosenberg were executed for espionage.
https://www.history.com/this-day-in-history/rosenbergs-executed

They were executed at Sing Sing prison. The claim, in the article, that their convictions and subsequent executions were questionable. This a liberal platitude. The opening of USSR intelligence files remove all doubts that the Rosenberg’s acted together.