What happened on April 30 1950?

On April 30, 1950, the U.S. government announced the establishment of the Federal Bureau of Investigation's (FBI) "Security Index," a list of individuals considered potential threats to national security. This was part of broader efforts during the early Cold War era to identify and monitor suspected communists and subversives amid rising tensions between the U.S. and the Soviet Union. Additionally, on this date, the first episode of the TV show "The Ed Sullivan Show" aired, marking a significant moment in American television history.