In this March 5, 2013 photo, a musher and dog team cross 

In this March 5, 2013 photo, a musher and dog team cross the ice between the Rohn and Nikolai checkpoints in Alaska during the Iditarod Trail Sled Dog Race.   (AP Photo/The Anchorage Daily News, Bill Roth)
Associated Press
In this March 5, 2013 photo, a musher and dog team cross the ice between the Rohn and Nikolai checkpoints in Alaska during the Iditarod Trail Sled Dog Race. (AP Photo/The Anchorage Daily News, Bill Roth)
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