In this 2012 photo released by National Geographic Channels and Brian Catalina 

In this 2012 photo released by National Geographic Channels and Brian Catalina Entertainment, Dallas Seavey, center left, high-fives Willi Prittie in the Tordrillo Mountains in Alaska. Seavey, who became the youngest Iditarod champion ever when he won the race in 2012, is among eight mushers or outdoor adventurers featured in the latest reality show set in Alaska. "Ultimate Survival Alaska" premieres Sunday on NatGeoTV. (AP Photo/Brian Catalina Entertainment, Kyle Wheeler)
Associated Press
In this 2012 photo released by National Geographic Channels and Brian Catalina Entertainment, Dallas Seavey, center left, high-fives Willi Prittie in the Tordrillo Mountains in Alaska. Seavey, who became the youngest Iditarod champion ever when he won the race in 2012, is among eight mushers or outdoor adventurers featured in the latest reality show set in Alaska. "Ultimate Survival Alaska" premieres Sunday on NatGeoTV. (AP Photo/Brian Catalina Entertainment, Kyle Wheeler)
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