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Olympics Day 11 - Gymnastics - Artistic

Gabrielle Douglas of the United States competes on the beam during the Artistic Gymnastics Women's Beam final on Day 11 of the London 2012 Olympic Games at North Greenwich Arena on August 7, 2012 in London, England. (Photo by Michael Regan/Getty Images)

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