he'd be out in his wilderness area and people would come through on snow mobiles. it would infuriate him planes would fly over. he would take his .22 and try to shoot at a plane. it's like he couldn't get away from society and technical things like that. and so, i think all those things are what drove him to kind of retaliate against society which wouldn't leave him alone. >> mr. kaczynski was alienated from society, and once he made up his mind to start killing people, he used all his intelligence to do it. >> kaczynski started his bombing campaign in 1978. his first devices were somewhat crude and ineffectual. over the years, he perfected his techniques. kaczynski kept meticulous notes and followed his own exploits through newspaper accounts producing a chilling account of a man obsessed by killing.