A musher travels across Norton Sound on their way to Koyuk in Alaska during the Iditarod Trail Sled Dog Race on Monday, March 11, 2013. (AP Photo/The Anchorage Daily News, Bill Roth)

Associated Press
A musher travels across Norton Sound on their way to Koyuk in Alaska during the Iditarod Trail Sled Dog Race on Monday, March 11, 2013. (AP Photo/The Anchorage Daily News, Bill Roth)
A musher travels across Norton Sound on their way to Koyuk in Alaska during the Iditarod Trail Sled Dog Race on Monday, March 11, 2013. (AP Photo/The Anchorage Daily News, Bill Roth)
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