>> thomas mosser was killed by a mail bomb sent to his home in north caldwell, new jersey. as it turned out, mosser had been targeted because kaczynski mistakenly believed he had helped exxon clean up its image after the exxon valdez oil spill. just over three months later, the unabomber's reign of terror was suddenly overshadowed by a much more destructive blast. >> on the morning we all get the call there's been a terrible bombing in oklahoma city. so we're really focused on this at this point, because everybody's going to be asking is this the unabomber. and we gave our best assessment then that we didn't think it was. because these are different personalities. these are different types of bombings. one is specific targeted, the other is a mass murder. >> any thought the unabomber was responsible for oklahoma city was quickly erased when timothy mcveigh was arrested two days after the blast. ted kaczynski, it seems, had his