New Details About the Deadly Shooting in Canada and the Heroes Who Saved Lives

Gunman ran through the streets with a long gun, before going on rampage and taking the life of dedicated soldier and father.
3:04 | 10/23/14

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Transcript for New Details About the Deadly Shooting in Canada and the Heroes Who Saved Lives
The stunning new images of that moment of terror, just 60 miles north of the border. Video now of the alleged gunman. Watch this. A car approaches. The crowd sprinting away. And here's why. The gunman, jumping out of a car, carrying a rifle. Running outside parliament there, as bystanders race for cover. What we're learning tonight about the suspect. How many times he'd been to the U.S. And we have new images of the victim. A young father and soldier who loved dogs. He saved one. ABC's Dan Harris is in ottawa again tonight with the incredible new footage. Dan? Reporter: David, good evening. Tonight from the scene of the crime, we are just outside Canada's parliament building. As you mentioned, we are now getting a vivid new look at the rampage that took place here. About tonight, we're getting a sense just how close the gunman got to this country's prime minister. This is the moment the attack on parliament begins. The new video shows the suspect leaving his car and sprinting towards the parliament building. He's carrying a long gun. Terrified people are running away. Watch. He steals this black car, drives it around to the front steps. The car still moving, he jumps out, races inside, officers in hot pursuit. And this is what happens next. Gunfire echoing off the ornate historical walls of parliament. These right here are the steps the gunman ran up during his rampage. After an all-day lockdown yesterday, today, they are letting us back into the building. The bullet holes were visible everywhere. The gunman then came directly through this entryway where he started tangling with some of the guards. Shots where fired, and that's when the gunman started running, again, with bullets flying at him, directly down this hallway. This is the incredible part, the then passed these two rooms which were filled with members of parliament and in fact, in this room was the prime minister himself. Amid the chaos, prime minister Stephen Harper quickly whisked away. But in a small room nearby, this member of parliament was trapped with her 2-month-ofld baby. You must have been terrified. I was terrified, of course. And the first thing I thought how can I make sure the baby is not yetting and crying? Reporter: She was saved by this man, the parliament's Sargeant of arms, Kevin Vickers, who shot and killed Michael zehaf-bibeau. Look at this new video in Vickers in the moments immediately afterward. Gun still in hand, seemingly completely calm. Today on the floor of parliament, he received a standing ovation. And there was also a moment of silence for corporal Nathan Cirillo, a reservist, father, and dog lover, who was shot and killed while guarding the national war memorial, moments before the gunman attacked parliament. And there's one more emotional moment to tell you about. Today, the prime minister of this country took to the floor of parliament and vowed that Canada will never be intimidated by terrorists. David? Dan Harris on the scene again tonight. Dan, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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