1/5 On December 11, 1972, Apollo 17 landed on the moon, the final Apollo lunar landing. File Photo courtesy of NASA Dec. 11 (UPI) -- On this date in history: In 1816, Indiana joined the United States as its 19th state. Advertisement In 1936, Britain's King Edward VIII abdicated to marry American divorcee Wallis Warfield Simpson. His brother succeeded to the throne as King George VI. In 1941, four days after Japan attacked Pearl Harbor, Germany and Italy declared war on the United States. In 1946, UNICEF was established. In 1951, Joe DiMaggio announced his retirement from baseball. UPI File...