The Senate ratified the Louisiana Purchase.
Gen. Douglas MacArthur returned to the Philippines, 30 months after he said "I shall return."
The U.S. House Un-American Activities Committee opened meetings about alleged Communist infiltration in the Hollywood film industry.
The 31st president of the United States, Herbert Hoover, died in New York at age 90.
Jacqueline Kennedy married Aristotle Onassis.
The Sydney Opera House was opened by Queen Elizabeth II.
Col. Muammar el-Qaddafi is killed by rebel troops in Surt, Libya, his hometown.