The first Ford Model T rolls out of the factory, the Warren Commission concludes Lee Harvey Oswald acted alone, Ben Johnson is stripped of his Olympic gold medal, and Mark McGwire makes history, all on this day.
1930: Bobby Jones wins the U.S. Amateur Championship to become the only golfer to ever win the (pre-Masters) Grand Slam, or all four major championships in the same calendar year. The old structure of the grand slam was the U.S. Open, British Open, U.S. Amateur and British Amateur.