here's something else. more than a decade ago a similar panel convened by the national institutes of health reached a similar consensus and the brain injury association of america also consider it's effective. here's one more thing you should know, cognitive also expensive, cognitive rehab is also expensive, costing between $15,000 and $50,000 per soldier. keeping them honest, is cost a factor in this particular story in tricare says it's not. we're going to let you decide. i talked earlier to paul rieckhoff, executive director and founder of iraq and afghanistan veterans of america, and t. christian miller, senior reporter for propublica who worked on this tricare investigation. so, paul, let's get right to it. brain injury is a signature injury of this war. we've been talking about that. i'm holding up a stack of studies here that show cognitive rehabilitative therapy is effective, yet many veterans aren't getting it. why is that? >> right now tricare's not paying for it. i think that's a major problem. what we've seen across the board is the medical delivery system