A Timeline of a Tragedy: How 9/11 Unfolded

As America remembers September 11, 2001 fourteen years later, INSIDE EDITION is looking back at how the tragedy unfolded by revisiting some of our previous reports.

It was a clear, sunny day when Al-Qaeda terrorists hijacked four passenger planes and crashed two into the World Trade Center and one into the Pentagon.

Passengers on the fourth plane fought back and the aircraft crashed into a field in Pennsylvania, killing everyone on board.

Timeline: John F. Kennedy's Final Hours

A total of nearly 3,000 people lost their lives in the tragedy.

The video above provides a chronology of the tragic events of the day that changed the world.

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