Mush! Training for the the Can-Am dog sled race – in pictures

By Joseph Prezioso/AFP/Getty

Marla Brodsky, a professional musher, is building her Alaskan husky dogs' distance endurance to prepare them for 100- and 250-mile races. They often train in subzero conditions near their home in Northampton, Massachusetts

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Source: Mush! Training for the the Can-Am dog sled race – in pictures