On this date in history: In 1643, King Louis XIV, who would be known as "The Sun King," became ruler of France at the age of 4. In 1796, Dr. Edward Jenner, a rural England physician, tested his smallpox vaccine. It was a success. In 1804, one year after the United States doubled its territory with the Louisiana Purchase, the Lewis and Clark expedition left St. Louis on a mission to explore the Northwest from the Mississippi River to the Pacific Ocean. In 1904, the Olympic Games were conducted