Events on May 18

1980
Eruption of Mt. St. Helens
Mount St. Helens, a volcano in southwestern Washington State, erupts in a massive explosion.

1953
First Woman to Break the Sound Barrier
Jacqueline Cochran becomes the first woman to break the sound barrier when she piloted a North American F-86 Canadair over Rogers Dry Lakein California.

1951
UN Moves to its Permanent HQ in Manhattan
The United Nations moves to its permanent headquarters in Manhattan.