Is there a connection between PTSD and blast exposure?

Studying the brains of people who suffered traumatic brain injuries. More

As a combat photographer in the army, Jacob Fadley spent time close to heart-thumping blasts, yet he came home without a scratch -- at least on the outside. In part three of our series War on the Brain, special correspondent Soledad O’Brien reports on how talks to a neuropathologist who is studying the brains of people who suffered traumatic brain injuries and the possible connection to PTSD.

AIR DATE 3/31/17