9/11: 'Twin Towers didn't collapse due to fire,' say conspiracy theorists
New York: On September 11, 2001, 2,996 people were killed during one of the deadliest attacks in American history.
The timeline of the 9/11 series of collapse of the World Trade Centre (WTC) buildings is as follows:
8:45 AM: a hijacked American passenger--Boeing 767 crashed into the north tower of the WTC in New York.
The aircraft loaded with 20,000 gallons of jet fuel struck near the 80th floor of the 110- storey skyscraper.
8:59 AM: a second Boeing 767-- United Airlines flight hit near the 60th floor of the south tower.