Twenty years ago today, the United States witnessed the biggest and bloodiest attack on its soil in modern history. At least 2,977 men and women died and at least 25,000 were injured after a gang of terrorists crashed a series of commercial aircraft into the Twin Towers of the World Trade Center in New York, leaving the American people in a state of shock and disbelief. Across the world, millions of people looked on in horror at devastating scenes of desperate people trapped in the upper floors of the towers, some of whom jumped to their deaths rather than face being burnt alive, shortly before the towers collapsed, leaving thousands buried under the rubble.