This Day in American Military History

20 July 1960: The first launch of a Polaris missile occurred when the submarine George Washington fired two missiles while submerged off Florida. President Dwight Eisenhower received this message from the submarine’s command: “POLARIS – FROM OUT OF THE DEEP TO TARGET. PERFECT.”

Brandus, Paul. This Day in U.S. Military History (p. 177). Bernan Press. Kindle Edition.