 O.J. Simpson was ordered to stand trial on charges of murdering his ex-wife, Nicole, and her friend, Ron Goldman, back in 1994. The Mayo Clinic in 97, and the government warned a diet-drug combination known as Fen-Phen could cause serious heart and lung damage, and it certainly did. In 2011, Space Shuttle Atlantis was launched in its final mission of the U.S. Space Shuttle program. Here's the countdown.