In 1910, the first-ever Father's Day in the United States was celebrated in Spokane, Washington. (President Richard Nixon would make Father's Day a federally recognized annual observation through a proclamation in 1972.)
In 1953, Julius Rosenberg, 35, and his wife, Ethel, 37, convicted of conspiring to pass U.S. atomic secrets to the Soviet Union, were executed at Sing Sing Prison in Ossining, New York; they were the first American civilians to be executed for espionage.
In 1963, Soviet cosmonaut Valentina Tereshkova completed her historic flight as the first woman in space, landing safely at the conclusion of the Vostok 6 mission.
In 1964, the landmark Civil Rights Act of 1964 was approved by the U.S. Senate, 73-27, after surviving a lengthy filibuster.
In 1975, former Chicago organized crime boss Sam Giancana was shot to death in the basement of his home in Oak Park, Illinois; the killing has never been solved.