which raises all sorts of questions. but in terms of the tactic has there been an evolution of tactics? it seems -- we have seen a number of lines created by the police trying to at least contain, i guess, the spread of some of the violence. are they moving intoe ing intoing into arrest people and grouping in lines or maintaining the lines? >> reporter: right. i can tell you that it is -- my impression is given what we have seen out here on the streets, for the last several hours, i think the police have been -- they have given people a lot of room. there goes one of the police cars you can see that has been damaged in the melee out here. but the truth is i think the police have been fairly flexible with people who have been exercising if you will the first amendment rights. and but if somebody is getting