now to talk more about the movement is angus johnston, historian of student activism, who teaches at hostos community college in the city university of new york. angus thank you so much for joining us. >> thanks for having me. >> look, you teach, i think, at a different college, right in new york city, seeing what happened, though, at columbia, what do you think about what transpired? >> so i think it's really interesting that what all of this was started by was columbia's decision to send in the police and then for about a week, they realized that that had been a mistake, and they were attempting to negotiate. and then they did something very strange. they announced that they were suspending all of the students who were participating in the encampment without first removing them. and so i think it was at that point, kind of inevitable that students were going to escalate in turn, because basically columbia said you had nothing to lose. >> can i just ask you then obviously it sounds like you're saying columbia did it all wrong, what should have what should they have done? and who did it rig