Traumatic Brain Injury Affects Hundreds Of Thousands Of Veterans, Leaves Devastating But Often-Invisible Wounds

10/03/2010 01:36 pm ET | Updated May 25, 2011

The doctor begins with an apology because the questions are rudimentary, almost insultingly so. But Robert Warren, fresh off the battlefield in Afghanistan and a surgeon's table, doesn't seem to mind.

Yes, he knows how old he is: 20. He knows his Army rank: specialist. He knows that it's Thursday, that it's June, that the year is 1020. Quickly, he corrects the small stumble: "It's 2010." He knows that his wife is Brittanie, that she's due with their first child any day now, and that they "got married two to three weeks before I went to that country."

Stumble No. 2: "That country."

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