‘6 Days’ tells the story of a daring SAS raid to rescue hostages in London

It was one of the most audacious special operations raids ever launched. Nearly 30 hostages were being held for close to a week in the heart of Britain's capital city — the target of an assault by a Middle Eastern separatist group who stormed the Iranian embassy.

And in broad daylight, after six days of fruitless negotiations in April and May of 1980, one of the world's most skilled counter-terrorist units assaulted the target in front of news cameras who broadcast the daring operation live around the globe.

In the end, only one of the hostages was killed and two wounded and the nearly three dozen commandos from the British Special Air Service cemented their place as some of the most fearsome and capable operators the world had ever seen.

That dramatic story will be retold this summer in the movie "6 Days." Directed by Toa Fraser and starring Jamie Bell, Abbie Cornish and Mark Strong, the movie recounts the drama of the Iran embassy takeover and the rescue mission, dubbed "Operation Nimrod," from the perspective of the SAS team, a BBC reporter and the police negotiator trying to get the terrorists to surrender their prisoners.

Perhaps the most remarkable aspect of the story is that the SAS assault took place in broad daylight in front of dozens of TV cameras — exposing for the first time the secretive world of Britain's most elite warriors and making them instant heroes in the eyes of their countrymen.

"6 Days" is scheduled to open in the England in August. No U.S. release date has been set so far.