Iditarod
The dog fatalities happened in teams led by fairly inexperienced mushers.
Race officials claimed that providing the dogs shelter from the severe storm gave them a competitive advantage.
Massive storm pummels mushers and their dogs near the end of 1,000-mile race.
The alleged assailant killed Nash, a 3-year-old male dog.
WHAT'S HAPPENING
"Am I concerned about the fate of winter in general and our world climate as a whole?" one musher said. "Absolutely."
The president also exchanged Eskimo kisses with local educators.