The Photos From 9/11 We Will Never Forget

This year marks the 18th anniversary since the day the world changed. Warning: Distressing Content

At 8.46am on 11 September 2001, American Airlines Flight 11 crashed into the World Trade Centre's North Tower after it was hijacked by five people.

As the world's cameras were pointed to the burning North Tower, at 9.03am, United Airlines Flight 175, also hijacked by five people, crashed into the South Tower.

The South Tower collapsed a terrifying 56 minutes later, and at 10.28am the North Tower collapsed, sending plumes of toxic dust and rubble into the air.

The attack killed 2,606 people in the World Trade Centres, 87 people on board Flight 11 and 60 on Flight 175.

READ MORE: Sandra Sully Recalls The Night She Talked Australia Through 9/11

In Washington, D.C., the hijacked American Airlines Flight 77 crashed into the Pentagon, killing 125 people inside the building and the 59 passengers on the plane.

A fourth plane, United Airlines Flight 93, was also hijacked, believed to be headed to either the Capitol or the White House. In a tremendous act of bravery, the 33 passengers and seven crew overpowered the hijackers, with the plane crashing into a field in Shanksville, Pennsylvania.

United Airlines Flight 175 Crashes Into The South Tower

Photo: Getty

The five hijackers broke into the cockpit about half an hour into the flight and took over the plane. Air traffic controllers noticed a flight path deviation four minutes later but were unable to establish contact with the plane.

'The Falling Man'

This man, who has never been identified, was pictured falling to his death from the upper levels of the North Tower. The photographer, Tom Junod, took a series of a photo that showed this man tumbling through the air.

It is believed at least 200 people fell to their deaths before the towers collapsed. The deaths of all these people were ruled as 'homicides' by the New York City medical examiner's office.

Firefighter In The Stairwell Of The North Tower

Mike Kehoe, along with other firefighters, risked their own lives by entering the Towers to help the injured escape. This photo was taken just minutes before the North Tower collapsed.

He as originally thought to have been killed, but was found to be alive two days later. A reluctant hero, he has refused to give interviews for many years.

'Dust Lady'

Photo: Getty

Marcy Borders covered in dust as she takes refuge in an office building after one of the World Trade Center towers collapsed. Borders was caught outside on the street as the cloud of smoke and dust enveloped the area. She battled years of drugs and alcohol addiction brought on by the trauma she experienced.

After getting herself clean, Borders was diagnosed with stomach cancer, which she believed was caused by the chemicals she ingested after the attack. Borders died in 2015.

The Moment President Bush Was Told About The Attacks

Photo: Getty

US President George W. Bush has his early morning school reading event interrupted by his Chief of Staff Andrew Card (L) 11 September 2001, shortly after news of the New York City airplane crashes was available in Sarasota, Florida.

The Remains Of The Twin Towers

Photo: Getty

For 100 days, the rubble of the Twin Towers continued to burn. A near-constant stream of water was poured onto the site, later dubbed Ground Zero, to stop the burning of toxic chemicals and debris that was fuelled by office papers and furniture.

Cleanup of the site was completed in May, 2002.

The Flag Raised Among The Rubble

Photo: Getty

Firefighters George Johnson, Dan McWilliams and Billy  Eisengrein raised the U.S. flag in the rubble of the World Trade Centres at about 5pm on the day of the attack. The photo has often been compared to an iconic WW2 photo of U.S. soldiers raising the flag on Iwo Jima.

The flag, which was originally taken from a nearby yacht, went missing shortly after this photo was taken, and was found nearly 12 years later. It was unveiled on the 15th anniversary of the attack and can now be viewed at the museum on Ground Zero.