Trump aide Margo Martin reveals horror of assassination attempt as new footage shows her fleeing carnage

One of Donald Trump 's closest aides has revealed the horror of the assassination attempt in Butler, Pennsylvania , as part of a new documentary.

Margo Martin opened up about the harrowing events of July 13 for the docuseries produced by the Tucker Carlson Network, the Art of the Surge .

The 28-year-old is seen in heart-stopping footage at the perimeter of the rally grounds watching as panicked Trump supporters spotted gunman Thomas Crooks crawling on top of a roof just seconds before he opened fire .

Chilling footage shows Martin looking over towards the direction of Crooks before gunshots break out and she turns to run away.

'I knew pretty immediately it was a gun, all I remember is running through the open field, with bullets coming form behind me, and I had no idea where they were going,' Martin said.

'I found the closest car next to me and got behind a car wheel.'

A second piece of video, taken from bodycam footage of an officer, shows her ducking behind a vehicle as chaos breaks out.

Martin described how she usually stays by the stage during rallies in a secure area known as the buffer.

But she decided to venture towards the edge of the rally grounds that day to film from another angle.

'For whatever reason that day, I decided to walk around and get content elsewhere. So I walked over to the fence line, that's when I actually saw the commotion going on across the way,' Martin said.

A crowd of Trump supporters who were just yards away from gunman Crooks saw him on the roof and had begun shouting to alert cops.

But before the Secret Service had time to react, he shot Trump - the bullet whizzing through the ex-president's ear .

Trump's reaction in the aftermath will go down as one of the most iconic political moments in history, standing up, raising his fist and shouting to the crowd: 'Fight, fight, fight.'

Carlson's new documentary features new footage captured by the filmmakers as the carnage unfolded, including Secret Service agents diving on top of Trump staffers close to the stage and bloodied members of the crowd running away in terror.

Corey Comperatore, a firefighter, was killed by one of the shots that missed Trump. Two other rally-goers were wounded.

Two days after the shooting the Republican National Convention kicked off in Milwaukee, Wisconsin.

Martin said that there was no doubt in Trump's mind that he would be at the convention.

'I first saw him when we left the hospital and got to the airport,' she said.

'We were all gathered around the TV watching what had just happened, there was no time to even process it, we're so on the go, we had the RNC in a couple days - there was no question in his mind, he was going to the RNC, nothing was gonna change about the schedule.'

Trump made his triumphant entrance to the convention on the Monday evening, wearing a bandage over his ear.

The ex-president appeared to be moved by the reaction of the crowd chanting 'fight' as he made his way to sit with his family and top campaign staff.

Joe Biden dropped out of the race just days later as Trump surged ahead in the polls.

Trump would again be targeted in a second assassination attempt at his Palm Beach golf club on September 15.

The shootings have failed to halt the Trump campaign and with just five days until the country votes he appears more likely than ever to clinch the White House.

The Republican candidate is leading in every swing state, according to the averages taken by Real Clear Politics.

Meanwhile the betting odds imply a 64 percent probability that he wins on November 5, putting his chances on par with those seen in the aftermath of the first assassination attempt.