Aliy Zirkle handles her dogs during a rest in Galena along the Yukon River, her last stop before heading towards Nulato. Late in the night, as she approached Nulato, Zirkle was attacked by a snowmobiler a few miles outside the small community. Zachariah Hughes/Alaska Public Media hide caption

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Zachariah Hughes/Alaska Public Media

Aliy Zirkle drives her dog team during the 2014 Iditarod. Emily Schwing/NPR hide caption

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Emily Schwing/NPR

Iditarod's Top Dogs Will Brave New Twists

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Several female mushers in the Iditarod Trail Sled Dog Race are trying out new attire that allows them to skip bathroom stops. Here, a musher and his team pass fans at the ceremonial start of the race in Anchorage. Dan Joling/AP hide caption

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Dan Joling/AP