A 60-mile marathon event descended into chaos in northwestern China after freezing weather and gales struck during a mountainous stretch of the race. Thousands of rescuers were sent out to find runners who went missing during the foul weather. Authorities report 21 people died.» Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC
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China Ultramarathon Turns deadly After Freezing Rain Descends
