OUTFRONT next. The breaking news. New attacks against police officers around this country as new details emerge tonight about the deadly ambush in Dallas. Was the shooter planning an event larger attack? 
Plus, the attack playing out live on Facebook. My guest, the man who risked his life to film it. Why did he do it? 
And he survived three tours of duty overseas only to die in the streets of Dallas protecting Americans. The father of that brave police officer is my guest tonight. Let's go OUTFRONT.

Good evening. I'm Erin Burnett. OUTFRONT tonight, the breaking news. Terror in Dallas. New details coming out about the sniper who shot 12 police officers, killing five of them in a six-hour siege last night. It is the deadliest attack on law enforcement since 9/11. Micah Xavier Johnson, a 25-year-old army vet is now believed to be the lone shooter. CNN learning that he was armed with two weapons, a semiautomatic rifle and a handgun. 

Police making a stunning discovery in Johnson's home late today. Bomb-making materials, ballistic vests, rifles, ammo and a journal of combat tactics. And we have new video tonight of a witness who captured footage from the parking garage as the gunman appears to be raining the gun fire down on the streets. 

BURNETT: 
This comes as the nation is on edge, more police officers have come under attack in just the past hours. In Tennessee, a gunman targeting a police officer shouting "Black Lives Matter." In Georgia, a suspect luring a policeman into an apartment complex, shooting and wounding him. And in Missouri, a driver pulled over for speeding then shooting the officer in the neck and that officer is in critical condition tonight. The others are all injured. 

All of this happening as tensions are running high across the nation. Protesters gathering from New York to Los Angeles. These are live pictures of Atlanta that you're looking at.