hypnosis, gestault, yell it out, scream it out. nothing worked. >> then she discovered an experime experiment run by a psychiatrist in charleston, south carolina. >> this is the place where we do the study. this is where we meet with people and do the sessions. >> intense psychotherapy, including eight-hour sessions after taking a capsule of mdma, ecstasy. listen closely. in this tape, you can hear rachel along with the doctor. >> i really need -- keep guiding me. >> it felt as if my whole brain was powered up like a christmas tree all at once. >> sometimes usually people did have very positive, affirming experiences. a lot of time it was revisiting the trauma. it was painful, difficult experience, but the mdma seemed to make it possible for them to do it effectively. >> within weeks, rachel says about 90% of her symptoms were gone. >> i don't scream. i don't have flashbacks anymore. >> and in results just publi published, the doctor says 14 of 19 patients were dramatically better more than three years later. >> the question is, ok