demonstrations. so students began to become more militant. >> columbia university, students barricade themselves into university buildings. their leader is a 20-year-old ex-boy scout, mark rudd. >> i would say that we now have more support than any group about any political issue has ever held at any time. >> columbia became the symbol of students and revolt. >> activists like tom hayden went to columbia and said, let's have more columbias. there's nothing like feeling that you're fighting the power or somebody's listening to you, at least, to draw more people in. >> we started shouting a phrase,