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United Airlines Flight 175 slams into the south tower of the World Trade Center in New York in this September 11, 2001 file photo. Image Credit: Reuters

On Tuesday 11 September 2001 suicide attackers hijacked four passenger jets and crashed them into New York’s World Trade Center, the Pentagon, and a field in Pennsylvania, killing almost 3,000 people in the worst terrorist attack in US history.

Infographic: 9/11 — the day that changed the world
Image Credit: Seyyed Llata/Gulf News | Graphic News