On the twentieth anniversary of 9/11, a powerful Budweiser commercial that has only aired once has resurfaced, and it is giving people serious chills...

On this day twenty years ago, the U.S experienced one of the most horrific terrorist attacks in modern history.

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This deadly attack was carried out by the terrorist organization, al Qaeda, who ultimately took the lives of nearly 3,000 innocent people and injured 6,000 more.

The attacks consisted of members of the terror group hijacking airplanes around the country.

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A total of 4 airplanes from major U.S air carriers United Airlines and American Airlines were hijacked and flown directly into targets.

2 were crashed into both towers of the World Trade Center in New York City, another was crashed into the Pentagon in Washington D.C...

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And the final flight was crashed into a field in Pennsylvania after the crew and passengers valiantly fought back against the hijackers.

Many lost their lives as they were stuck in the towers of the World Trade Center...

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There were hundreds of people working on the floors above where the planes hit, and those who weren't killed instantly by the impact were stranded in their tiny offices with nowhere to escape the rapidly burning fire from the jet fuel.

This was a truly devastating sight to see.

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People were seen desperately hanging out of their windows and waving t-shirts and rags in an attempt to catch attention and get help.

And, as the heat from the flames intensified...

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People began desperately jumping from the windows, plummeting thousands of feet to their deaths.

Photographers captured the chilling images...

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Which shocked not only the nation. but the entire world.

The towers eventually collapsed, wreaking utter havoc across New York City...

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And tragically, killing and injuring thousands more people.

The emergency services of New York were faced with a challenge like no other.

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But their bravery showed no bounds - police, paramedics, doctors, and firefighters worked around the clock for months following the tragedy.

The NYC Fire Department had never seen anything like it.

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Firefighters from across the state selflessly ran into the burning buildings in a desperate attempt to save as many lives as possible.

Over 400 emergency workers died in the line of duty on that fateful day...

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And, twenty years on, many more have perished, or have been forced to live with various health issues caused by the toxic fumes at ground zero.

September 11th continues to be one of the most harrowing days that our country has experienced...

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And every year without fail, we come together to remember those who gave their own lives protecting our country.

Each year, various tributes are made...

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And each year, Ground Zero lights up in a chilling, yet poignant display of remembrance and unity.

But some tributes are smaller than others...

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Thus bringing us to the story of the long lost Budweiser ad.

Back in 2002, the infamous beer brand had created a commercial specifically for the Super Bowl XXXVI...

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And it served as a moving and poignant tribute to the 2001 terror attacks.

But, to make the advert even more remarkable...

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It only aired once. 

The ad shows the Clydesdales passing the Statue of Liberty and crossing the Brooklyn Bridge...

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Before coming to a halt in a park overlooking the New York skyline.

As they stand with the iconic skyline in the foreground...

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The horses all take a bow, and you can see clearly where the World Trade Center once stood.

The image fades out...

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And the message, "We'll never forget" appear on a black screen.

You can watch the full ad here.

May all the victims of the dreadful events of 9/11 rest in peace. For stories on the heroics of that terrible day, keep scrolling...