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Olympic Decathlon victors

Olympic Decathlon victors with their medals after the presentation at the main stadium in Melbourne, November 30, 1956. They are Americans Milton Campbell, center; and Rafer Johnson, left; and Russia's Vassily Kouznetsov. (AP Photo)

Olympics Quiz: 12 questions from the '12 Games

As the 2012 London Games come to an end, we thought some expert Olympic fans might want to test their knowledge with a little quiz. -- By Chris Wilson, Yahoo! Sports