British man who saved 2,700 people in 9/11 attacks had heartbreaking final phone call to wife

The last heart-ripping phonecall between a 9/11 hero and his wife has been recounted, 25 years since the Twin Towers fell.

Originating from Cornwall, army man turned Wall Street security chief Rick Rescorla was all about his principles, and this was illustrated in the reaction to the Columbine High School massacre in April 1999.

"Can you believe it? The police were sitting outside while kids were getting killed," he reportedly told a comrade, per The New Yorker. "They should have put themselves between the perpetrators and the victims. That was abject cowardice. We could have flown to Colorado, gone in that building, and ended that s**t before the law did."

Fatefully, this bullish attitude was carried into the 11 September attacks while Rescorla was working in the south tower at Morgan Stanley Dean Witter.

As we know, al-Qaeda hijackers struck the north tower first, allowing south tower workers the opportunity to get out of their building safely.

Rescorla, convinced in years previous that the World Trade Center was the perfect target for terrorists, orchestrated the evacuation, saving 2,700 people on the day.

25 years on from his heroic passing, Susan Greer has remembered her husband (Dan Callister)

Amidst all the commotion, the second plane collided with the south tower with Rescorla still inside.

15 minutes later, he rang his wife Susan Greer, who'd been desperately trying to contact him at the office to no avail.

"Stop crying," he told her. "I have to get these people out safely. If something should happen to me, I want you to know I've never been happier. You made my life."

As the anniversary arrives once again, Greer has spoken to The Sun about the historically unforgettable ordeal.

"The phone was ringing constantly. I kept picking it up hoping it would be Rick but the calls were from friends. I had the television on and saw Rick's tower collapse," she recalled.

"I ran screaming into the street. I'm not sure why, I just ran outside.

"He was such a big, funny man. We'd be shopping and he'd grab me and start dancing. I treasure every single moment I had with him," she added, lovingly.

"For those of us who lost loved ones or survived the terrorist attacks, life will never be the same. Every time there's another terrorist attack or IS carries out a beheading, I cannot stop crying."

9/11 recorded 2,977 official deaths, with thousands more injured at the scene.

It remains the deadliest terrorist attack ever committed and the shockwaves are still felt today.