a statement released by the lawyer of the film's director randall miller and his wife producer jody savan they believed they had permission to be on the tracks from csx. they had no reason to believe that anyone would be placed in danger. they will live with the sorry of sarah's death for the rest of but tonight it's the latest train tragedy in southern california prompting sorrow. the fitness and entertainment worlds are mourning the loss of a rising star greg plitt, many thought was indestructible. >> he shows that you can stumble, you can fall but never give up. they empoe ured people by living by example. and that his body and his lifestyle is achievable. >> reporter: for "nightline," i'm brandi hitt in los angeles. >>> next, what happens to ebola orphans after their parents die from the disease. one little girl's story of homelessness and hope. >>> later on "nightline," a celebration on this mlk day. john legend and common bringing their hit song "glory" to selma. and we're there. d still. but jim has afib, atrial fibrillation an irregular heartbeat not caused by a heart valve proble