Preview: Invisible Wounds

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Preview: Invisible Wounds

by CBSTV Videos 0:56 mins

Preview: Invisible Wounds

by CBSTV Videos 0:56 mins

Tens of thousands of battlefield veterans now suffer permanent brain injuries from concussions -- or traumatic brain injuries -- received in Afghanistan and Iraq. David Martin reports on a situation the military is only recently coming to grips with for 60 Minutes, Sunday May 5 at 7 p.m. ET/PT.

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