On the morning of Tuesday 11th September 2001, millions of people around the world watched in disbelief as the WTC events unfolded live on television. Huge clouds of smoke billowed over Manhattan as each of the towers collapsed. Was what they had witnessed the result of the planes crashing and the resulting fires? Or were they watching a controlled demolition? Never before in the history of the world has a steel building collapsed due to fire. On this day three buildings did. Descending at free-fall speed, two million tons of steel and concrete cratered the earth killing more than 2700 people. The laws of physics suggest that such an event was impossible. Can we still believe that the impact of two planes cased these symbols of America to pulverize? WTC7, the third building to fall, was not hit by a plane. What occurred on 9/11 is now the most disputed story of the 21st century.