and at that point, their idea was fewer bombs, higher profile targets. >> weather underground, bomb the capitol to bring joy, to bring joy to america. to bring a smile and a wink to all those who hate the american government. >> when the police killed young black people, we bombed the police headquarters. when washington escalated the war into cambodia, we bombed the capitol. >> a bomb exploded early this morning in the pentagon. >> it was trying to exact a small price for these policy decisions that were so unjust. >> much of the pentagon is a public area, with visitors and tourists roaming through the halls, but security was tighter today than yesterday. >> the '70s is a first great era of mass air travel. at this time, there was virtually no security at airports. you could literally walk through the terminal, sometimes even on