ANCHORAGE, Alaska — Laura Wright's light-bulb moment came on a frigid day on the Yukon River, her back and shoulders aching from the effort of hauling a sled behind her as she skijored. Inspiration struck Rick Stafford when he was snowmobiling in Eureka and heard about two guys who had been medevacked after their machines ran out of gas and they had to spend the night outdoors, unable to walk to shelter in the deep snow. As for Greg Matyas, just about anything can bring out his inner Edison. He seems always to be thinking of ways to build a better mousetrap, or at least a better mountain bike. "I'm a tinkerer, I guess, in the worst possible way. I never leave well enough alone," Matyas...
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