White Mountain Checkpoint

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Iditarod musher Jeff King, from Denali, Alaska, is the first musher to leave the White Mountain checkpoint during the 2014 Iditarod Trail Sled Dog Race on Monday, March 10, 2014. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Iditarod musher Aliy Zirkle, from Two Rivers, Alaska, waits for her out time at the White Mountain checkpoint during the 2014 Iditarod Trail Sled Dog Race on Monday, March 10, 2014. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Iditarod musher Aliy Zirkle, from Two Rivers, Alaska, leaves in 2nd place from the White Mountain checkpoint during the 2014 Iditarod Trail Sled Dog Race on Monday, March 10, 2014. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Iditarod musher Jeff King, from Denali, Alaska, is the first musher to leave the White Mountain checkpoint during the 2014 Iditarod Trail Sled Dog Race on Monday, March 10, 2014. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Iditarod musher Jeff King, from Denali, Alaska, puts booties on his dog’s feet on the frozen Fish River as he prepares to leave in first place from the White Mountain checkpoint during the 2014 Iditarod Trail Sled Dog Race on Monday, March 10, 2014. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Iditarod musher Jeff King, from Denali, Alaska, puts booties on his dog’s feet on the frozen Fish River as he prepares to leave in first place from the White Mountain checkpoint during the 2014 Iditarod Trail Sled Dog Race on Monday, March 10, 2014. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Iditarod musher Jeff King, from Denali, Alaska, adds heat to his dog food cooker after arriving first into the White Mountain checkpoint during the Iditarod Trail Sled Dog Race on Monday, March 10, 2014. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Iditarod musher Aliy Zirkle, from Two Rivers, Alaska, arrives second behind Jeff King into the White Mountain checkpoint during the Iditarod Trail Sled Dog Race on Monday, March 10, 2014. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Twins Emily and Evelyn Huffman, 2, watch Mitch Seavey work with his dogs after he arrived at the White Mountain checkpoint during the Iditarod Trail Sled Dog Race on Monday, March 10, 2014, in White Mountain, Alaska. (AP Photo/The Anchorage Daily News, Bob Hallinen)

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Mitch Seavey arrives at the White Mountain checkpoint during the Iditarod Trail Sled Dog Race on Monday, March 10, 2014, in White Mountain, Alaska. (AP Photo/The Anchorage Daily News, Bob Hallinen)