>> nobody wounders what lyndon and i wear. [ laughter ] >> reporter: later that day, president kennedy would be dead. and the first lady's stunning pink suit stained forever with her husband's blood would begin a long and mysterious journey. when aids suggested she change her clothes after the shooting, she refused. phillip wrote a book about the kennedy assassination. >> her remark and i think she made it more than once is no, i'm going to leave these clothes on. i want them to see what they have done. >> reporter: hours later, mrs. kennedy continued to wear the suit during the emergency swearing in of lyndon johnson as president. >> that whole scene is obviously just surreal. she arrives in the cabin in air force one in these clothes, covered with the president's blood, and expected to stand there and witness the swearing in of her husband's successor. >> reporter: mrs. kennedy was still in her suit when she arrived later that evening in