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PGA Championship - Round Three

Graeme McDowell of Northern Ireland lines up a putt on the 18th green during Round Three of the 94th PGA Championship at the Ocean Course on August 12, 2012 in Kiawah Island, South Carolina. (Photo by David Cannon/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