Luan Marques, of Brazil, rests on his sled while his dog team sleeps at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race on Monday, March 4, 2013. (AP Photo/The Anchorage Daily News, Bill Roth)

Associated Press
Luan Marques, of Brazil, rests on his sled while his dog team sleeps at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race on Monday, March 4, 2013. (AP Photo/The Anchorage Daily News, Bill Roth)
Luan Marques, of Brazil, rests on his sled while his dog team sleeps at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race on Monday, March 4, 2013. (AP Photo/The Anchorage Daily News, Bill Roth)
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