>> arab guerillas fired an an israeli school bus near the lebanese border. >> the 1970s saw the development of the terrorist repertoire. >> gangs of young people, products of the riotous 1960s, prefer terror, kidnapping, bombing, arson, machine guns, death and destruction. >> it was a global thing. in the '70s, those who wanted change faster than was going to come resorted to violence. >> japan has had its first plane hijacking. >> the chronicle of terrorism which took them as far as athens, greece. >> most americans thought of terrorism as a problem that happens a world or half a world away. throughout the 1970s, terrorism began to hit home. >> an elegant townhouse in new york's greenwich village was destroyed by a series of dynamite explosions. >> authorities first assumed an accidental detonation in a gas line had been responsible, except that the blast had been just too powerful, destroying the $100,000 house and badly