Iditarod, 'The Last Great Race'

March 4, 2013: Leaders in Jessica Hendricks's dog team negotiate a steep drop off in the trail after leaving the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Musher Anna Berington negotiates a steep drop off in the trail after departing the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Michael Suprenant puts away a snow hook at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race on Monday. (AP)

March 4, 2013: Matt Giblin puts booties on leader Kenya before leaving the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race on Monday. (AP)

March 4, 2013: Jessie Royer leaves the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Musher Cim Smyth arrives at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Musher Sonny Lindner snacks his dogs at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Luan Marques, of Brazil, rests on his sled while his dog team sleeps at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Christine Roalofs prepares to rest with her dogs at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Christine Roalofs rests with her dogs at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Brownie, foreground, a sled dog in Mike Surenant's team, rests at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Mike Ellis eats breakfast while resting his dog team at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race on. (AP)

March 4, 2013: Ken Anderson puts booties on a lead dog, named Regret, at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Kristy Berington, left, and twin sister Anna Berington, right, pack up their sleds as they prepare to leave the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)

March 4, 2013: Angie Taggart rests in a musher tent at the Finger Lake checkpoint in Alaska during the Iditarod Trail Sled Dog Race. (AP)