March 12: Iditarod dog sled race

Sled dogs in Aliy Zirkle's team howl as they prepare to leave White Mountain, Alaska, on Tuesday, March 12, 2013, during the Iditarod Trail Sled Dog Race. (Bill Roth/Anchorage Daily News/MCT)

Sled dogs in Aliy Zirkle’s team howl as they prepare to leave White Mountain, Alaska, on Tuesday, March 12, 2013, during the Iditarod Trail Sled Dog Race. (Bill Roth/Anchorage Daily News/MCT)