The United States tested the first underwater atomic bomb at Bikini Atoll.
Puerto Rico became a commonwealth of the United States.
The Italian liner Andrea Doria sank after colliding with the Swedish ship Stockholm off the New England coast, killing 51 people.
The world’s first test-tube baby, Louise Joy Brown, was born in Lancashire, England.
Soviet cosmonaut Svetlana Savitskaya became the first woman to walk in space.
The supersonic airliner Concorde crashed after takeoff outside Paris.