ABSTRACT
Within minutes of the first plane hitting the North Tower of the World Trade Center, just before 9 am on 11 September 2001, television networks were showing live pictures of the burning building. As word spread of the catastrophe, millions of people across the United States and in many other countries tuned in and saw the second plane hit the South Tower. That building was more badly damaged than the North Tower and by the time it collapsed, many tens of millions of people across the United States saw it happen. A few minutes later, the North Tower also collapsed.
