Gen. Peter Chiarelli, now retired, made it his mission as the Army’s Vice Chief of Staff to bring down suicide rates among veterans. According to the Dept. of Veterans’ Affairs, 20 veterans die from suicide every day. Now, as CEO of One Mind, a brain research non-profit, he is looking for connections between suicide, post-traumatic stress and brain trauma. He joins Soledad O’Brien for an important discussion on how post-traumatic stress is diagnosed and treated, the link between brain injury and PST and the need for improvement in how research is conducted and shared.

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