Space Shuttle Columbia disintegrates on its way back to Earth
All 7 astronauts were killed in the disaster.

Ayatollah Khomeini returns to Iran after 15 years in exile
His triumphant return marked the beginning of the Iranian Revolution.

 Eddie Adams takes one of the Vietnam War’s best-known pictures
The image of the execution of a Vietcong officer in Saigon helped build opposition to the war.

Four black students start the Greensboro sit-ins
Their refusal to leave a “whites only” lunch counter was a milestone in the fight against racial segregation in the United States.

The first fascicle of the “Oxford English Dictionary” is published
The book contained entries A to Ant.