YOU WON'T BELIEVE WHAT HAPPENED ONE DAY BEFORE 9/11 || The Unseen Files

The World Trade Center in New York City collapsed on September 11, 2001, as a result of the al-Qaeda attacks. Two commercial airliners hijacked by al-Qaeda terrorists were deliberately flown into the Twin Towers of the complex, resulting in a total progressive collapse that killed almost 3,000 people. It is the deadliest and most costly building collapse in history.

Conspiracy theory: a theory that explains an event or set of circumstances as the result of a secret plot by usually powerful conspirators

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