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Norway's Petter Northug reacts after winning the men's Cross Country Skiing 50km mass start classic at Whistler Olympic Park on February 28, 2010 during the Vancouver Winter Olympics. AFP PHOTO / FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP/Getty Images)

Norway's Petter Northug reacts after winning the men's Cross Country Skiing 50km mass start classic at Whistler Olympic Park on February 28, 2010 during the Vancouver Winter Olympics.      AFP PHOTO / FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP/Getty Images)