I know the that 4 planes took off and 3 planes crashed into buildings and the last plane crashed into a Pennsylvania field. The 3 planes that crashed into the buildings, 2 of the planes hit the twin towers,while the other plane crashed into the Pentagon.We think the reason why the last plane crashed into the field is because the people in the plane the knew that the other planes crashed into the buildings, so they distracted the terrorist and saved the White House.
I will never forget the heroes of that day.