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Most Difficult Things To Do In Sports
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Most Difficult Things To Do In Sports

Sled Dog Racing
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Sled Dog Racing -
Alaska's 1,000-mile Yukon Quest and 1,150-mile Iditarod are only a little more than a month apart, so winning them back-to-back is more than demanding. It had never been done until last year, when Lance Mackey did it. Winning them back-to-back two years in a row? Mackey this year -- on feet frostbitten by the Quest's 40-below temperatures, yet. Matching his feat is going to take some doing.
Photographed by: AP
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