Aliy Zirkle puts booties on her dogs prior to leaving Koyuk on Monday, March 11, 2013, during the Iditarod Trail Sled Dog Race. (AP Photo/The Anchorage Daily News, Bill Roth)

Associated Press
Aliy Zirkle puts booties on her dogs prior to leaving Koyuk on Monday, March 11, 2013, during the Iditarod Trail Sled Dog Race. (AP Photo/The Anchorage Daily News, Bill Roth)
Aliy Zirkle puts booties on her dogs prior to leaving Koyuk on Monday, March 11, 2013, during the Iditarod Trail Sled Dog Race. (AP Photo/The Anchorage Daily News, Bill Roth)
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