Dallas Seavey poses with his lead dogs Reef, left, and Tide after finishing the Iditarod Trail Sled Dog RaceTuesday in Nome, Alaska. The Associated Press

Musher Justin Savidis' dogs wait in the truck before the restart of the Iditarod Trail Sled Dog Race in Willow, Alaska March 6, 2016. Reuters

Anna Berington's dogs wait at the ceremonial start of the Iditarod Trail Sled Dog Race to begin their near 1,000-mile (1,600-km) journey through Alaskaís frigid wilderness in downtown Anchorage, Alaska March 5. Reuters

A team charges down 4th Avenue in Anchorage as the 2016 Iditarod kicks off.

Musher Monica Zappa checks her dogs in with officials before the restart of the Iditarod Trail Sled Dog Race in Willow, Alaska March 6. Reuters

Cindy Gallea's team crosses a lake after the restart of the Iditarod Trail Sled Dog Race in Willow, Alaska March 6. Reuters

4-time Iditarod champion Jeff King and his team leave the ceremonial start of the Iditarod Trail Sled Dog Race to begin the near 1,000-mile (1,600-km) journey through Alaskaís frigid wilderness in downtown Anchorage, Alaska March. Reuters

Martin Koenig's team gets tangled up after leaving the start chute at the restart of the Iditarod Trail Sled Dog Race in Willow, Alaska March 6. Reuters

A frozen beach on the Bering Sea coast is seen near the last stretch mushers must pass before the finish line in Nome, Alaska. North winds blew so hard on mushers in their final push to the finish line of the race that one musher was forced to scratch while snowmobilers reported that even their machines were drifting in the wind.

Jeff Holt's team heads down the trail during the official restart of the Iditarod Race in Willow Alaska March 8, 2009. Under sunny skies, teams of mushers and their dogs, mostly Alaskan huskies, lined up with start times every two minutes, then rode through downtown streets to the cheering of dog-sled fans. The trek commemorates a lifesaving medicine relay in 1925. REUTERS/Nathaniel Wilder (UNITED STATES ANIMALS SOCIETY SPORT) - RTXCJBH