i talked to a number of people today who said they were gasesed and they were feeling the aftereffect of that irritating experience. >> we have seen and talked about the developments of this day, which included law enforcement. the national guard sent in by the governor of missouri. and the protesters were able to come next to the media at the start of the evening. now the troopers lined up nose to tail to make sure there's a distance. >> the police have seemed to change their tactics. people have to move, they can't stand in a group and protest. they have to keep going up and down the streets. the cars are penning the protests in and off the streets. they are now blocked off. the only vehicles going up and down are police vehicles. it's not as if the protesters walking through the streets would be jeopardizing themselves or anyone else. i asked the head of the law enforcement effort about that a minute ago. he said while we are determined to protect everyone's constitutional right. to do that we have to impose restrictio restrictions. >> we'll see how the evening goes. >> this is a d