Kit Roberts
Footage has been posted online which claims to show a 'new angle' of the devastating September 11 attacks.
The attacks, which took place on September 11, 2001, saw 19 members of jihadist terror organisation Al-Qaeda hijack four passenger planes, flying one in the Pentagon and two into the World Trade Center in New York.
Not including the hijackers, 2,977 people died in the attacks which marked an immediate and aggressive shift in US foreign policy, particularly in the Middle East.
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In the aftermath of the September 11 attacks, President George W Bush launched the War on Terror, with the US invading Afghanistan within weeks of the attacks.
In 2003, the US and its coalition partners would launch the invasion of Iraq.
It's difficult to overstate the importance of 9/11 as a pivotal moment in recent US history and the modern history of the Middle East and Central Asia.
Images of the Twin Towers with smoke pouring out of them before they collapsed became symbolic of the period which saw the War on Terror, and the wars in Afghanistan and Iraq.
And now, what is claimed to be new footage has been posted online almost 23 years on.
The footage was posted on YouTube by Kei Sugimoto on July 23.
The images show the towers belching out smoke and are seen not from the south or the east - the most well-known angles of the catastrophe - giving a whole new perspective on the devastating moments.
Sugimoto explained why it had taken him so long to post the footage some 23 years after the initial event.
And it was all down to getting the footage, shot on video, properly digitised.
Sugimento wrote: “I was cleaning my closet and found boxes full of Hi-8, Digital-8, and DV tapes. When trying to play them back I noticed that maybe about a 3rd of them had demagnetized over time and were either blank, or suffering from major data corruption.
"After researching online I learned that video tapes are not immune from age even when stored in ideal conditions, so I frantically started to digitize them. Thus I'm just uploading the video now."
He added: "If I remember correctly. I think I ran to get my video camera after seeing the second plane crash sensing that this was no ordinary accident."
One viewer commented: “This footage offers a unique perspective not seen from the south or east. You are watching these angles for the first time ever.”
Another reflected on the extraordinary historical discovery made in someone's house, writing on Reddit: “Makes me wonder how much history is being stored in people’s attics or basements waiting to be unearthed.”