Nightly news begins now. From nbc news World Headquarters in new york, this is nbc nightly news with brian williams. Good evening. Im lester holt sitting in tonight for brian. There has been a flurry of headlines today stemming from the violence and unrest in ferguson, missouri. Last nights jarring images of police clad in military gear and firing tear gas and rubber bullets at protesters on the has reverberated across this country including to the obamas vacation residence where the president called for peace and calm and lashed out at both violence against police and Excessive Force by police. This after a fourth night of violent protests stemming from a shooting death of an unarmed 18yearold man by a police officer. To the town of ferguson is back on edge as officials hope a change of strategy will help cool things off. We have two reports tonight from ferguson starting with nbcs ron allen. Reporter good evening, lester. Police are calling this town powder keg. Protesters are gathered again. You can see them marching down the street, perhaps several hundred of them, and this is the very place where all that violence erupted last night. The concern is whether these protesters will defy the call not to gather after dark. And just how much force the police will use to stop them. A fourth straight night of clashes turned fergusons main street into a battlefield. A score of heavily armed and Armored Police faced off with protesters. You must be out of the street reporter the trouble started when the police blocked hundreds of marchers and then as night approached ordered them disburse. Return to your vehicles. Reporter we were with the marchers, things were calm, winding down. Then the police seemed to run out of patience and tried to clear the streets. Hours later tear gas. Police insist they fired because bottles and molotov cocktails rained down on them. I thought it was beyond heavyhanded. Reporter antonio french spent a night in jail arrested in his car with other protesters. Smoke bombs come out and the tear gas comes out. Its not like i can just drive through the smoke. I think that its very important that we demilitarize a response to what have been by and large very peaceful protests. Reporter Law Enforcements response has come under scrutiny. Residents complain police have acted more like soldiers than cops. St. Louis county Police Officers seen here in full riot gear approaching one man are outfitted according to police with submachine guns and assault rifles. Earlier this week tactical officers arrived in a bearcat, an Armored Vehicle which can 50caliber machine gun, and yesterday pointed in the direction of protesters a precision rifle with a range of 500 to 800 yards. This afternoon protesters brought their grievances right to the front door of the Ferguson Police department. I do believe in selfdefense. Reporter and the states governor announced a change. Im announcing that the missouri Highway Patrol under the supervision of captain ron johnson, who grew up in this area, will be directing the team that provides security in ferguson. Reporter right now the Police Presence is not that heavy. You can see the protesters are marching down that street, that main drag, going into the neighborhood where Michael Brown and his family live. The boy who was killed. Again, the police are laying back. They want to keep this road open. Things are calm for now, orderly. The big question, what will happen after dark . Lester. Ron allen, thanks. It is important to note the investigation into the circumstances surrounding the shooting of Michael Brown is not complete. No matter what the outcome this tragedy has brought to the surface all thativides the community of ferguson. Our coverage continues with kevin tibbles. Reporter ferguson, was confronted today by some of those arrested for protesting browns death. Accusing police of going too far. He promises to address concerns. This is an issue perception between Law Enforcement and africanamericans. This didnt start here, hopefully we can end it here. Reporter and while police prepare for perhaps another angry night, ferguson schools are closed, unlike elsewhere in st. Louis. Our children are suffering and they are afraid. Reporter still in the midst of tension normalcy. Mail gets delivered. People chat. Brian coldman wears his message loud and proud on his chest. We have to think in the future. And the future of what are we going to do about this. We should communicate. Sit down. Reporter and many people here say their real concern is the fact that the two sides are so divided and so far apart, lester, that they worry they will never be able to sit down and speak to one another. Will never be able to sit down and speak to one another. All right the effects of botox® may spread hours to weeks after injection, causing serious symptoms. 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