There may be a one-way route to Nome but there are a number of ways to get there. 

Defending Iditarod champion Mitch Seavey has a need for speed -- not that he didn't before, but strategically his approach has changed and it begins with a new sled.

"I'm switching to the tried and true trailer method," Seavey said.

The trail and snow have slowed the group this year. Now, he wants to pick up the pace but the strategy has worked.

Been carrying four at a time, so the math works pretty good on that run, rest schedule if you can keep your speed up and the other ones don't work too hard.

Not everyone does. Veteran musher Aliy Zirkle rarely will.

"I don't really carry dogs," she said. "I carry dogs if they need a nap or if I feel like tired."

So why would Seavey take some of his dogs off the trail, at least for the moment? I'm on the brakes all the time. Might as well do something useful with the energy right?

As Seavey heads out, the minivan goes back to the shop and out comes the sports car. The field has been put on notice.

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