"God Defend New Zealand" became New Zealand's second national anthem, on equal standing with "God Save the King", which had been the traditional anthem since 1840.
Vietnam War: American forces raided the North Vietnamese Sơn Tây prison camp in an attempt to rescue 61 American POWs who were thought to be held there.
The Verrazzano-Narrows Bridge, connecting Staten Island and Brooklyn in New York City, opened to traffic as the longest suspension bridge in the world at the time.