doesn't done, he will not be the last. we're keeping them honest with a 360 investigation. how does one of the most physically fit presidents wake up one day with heart trouble. dr. sanjay gupta is here with more. we start with an unusual and traumatizing murder trials in a very long time. the defendant, u.s. army psychiatrist nadidal hasan wentn a rampage three weeks before he was scheduled to deploy to afghanistan walking into a troop processing center. he says he did it for alah. he admits this by the way but legally cannot plead guilty soft today in opening statements on day one of his court marshall acting in his own defense, if you want to call that, he made a case for the prosecution and that only begins to cover the