Mark Tewksbury, concussions, the cost of cancer treatment, and human trafficking in Canada's North (Check-in)

The Current

Woodpeckers bash their heads again and again without injury. As a follow up to our item on concussions, we hear from a doctor who looks for clues on preventing concussions. Plus Anna Maria speaks with our Friday host Mark Tewksbury about Sochi 2014.

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