This Day in Naval History – July 20
1846 - First visit of U.S. warships (USS Columbus and USS Vincennes) to Japan is unsuccessful in negotiating a treaty.
1960 - In first launch of Polaris missile, USS George Washington (SSBN 598) successfully fires 2 operational Polaris missiles while submerged off Florida.
1964 - Four Navy divers enter Project SEALAB I capsule moored 192 feet on the ocean floor off Bermuda for 11 day experiment.
1969 - Former Navy pilot Neil Armstrong is first man to set foot on the moon. While taking the first step, he said, "That's one small step for man, one giant leap for mankind." Armstrong was Commander of Apollo 11 which during its 8 day mission landed on the Sea of Tranquility. Recovery was by HS-4 helicopters from USS Hornet (CVS-12).
(Source: Navy News Service)