Twenty-three years later, Khalid Sheikh Mohammed and two other men accused of plotting the attack - known as 9/11 - are expected ... Two planes hit the Twin Towers of the World Trade Center ...

On September 11 last year ... a fire station near the Twin Towers to tell them people were trapped there. Of the 700 Cantor Fitzgerald staff in the World Trade Centre, 657 would die.

Watch as the Bell of Hope rings at St Paul's Chapel in New York City to mark the exact moment when the first of two planes hit the World Trade Center Twin Towers ... victims of 9/11 every year.

A recent decision to close the Top of the World Observation Deck on the 27th floor of the Baltimore World Trade Center raises ...

A new study finds that those who responded to the World Trade Center attacks on 9/11 may be at higher risk of early-onset dementia.

The memorial's twin reflecting pools and human-made waterfalls rest as eerie footprints where the World Trade Center's twin towers once stood ... as well as 9/11 rescue and recovery workers ...