The Hollywood Blacklist
The U.S. House Un-American Activities Committee opened meetings about alleged Communist infiltration in the Hollywood film industry.
The Senate ratified the Louisiana Purchase.
Gen. Douglas MacArthur returned to the Philippines, 30 months after he said "I shall return."
The 31st president of the United States, Herbert Hoover, died in New York at age 90.
Jacqueline Kennedy married Aristotle Onassis.
During the Watergate scandal, Attorney General Elliot L. Richardson and Deputy Attorney General William B. Ruckelshaus resigned and special prosecutor Archibald Cox was dismissed by President Nixon in what came to be known as the "Saturday Night Massacre."
Col. Muammar el-Qaddafi is killed by rebel troops in Surt, Libya, his hometown.
Here are the facts and trivia that people are buzzing about.