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Three-time winner Susan Butcher was among 70...

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Three-time winner Susan Butcher was among 70 dog teams and mushers who started the Iditarod Trail sled dog race, a 1,160-mile, two-week chase across Alaska from Anchorage to Nome.

The heaviest snow in a quarter-century has mushers concerned about attacks from moose unable to find food. Several mushers reported moose attacks on their teams during training and many are packing rifles for protection.

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