Step 1 : Introduction to the question "1. Which of the following was NOT involved in the airplane attacks on United States targets that took place on 11 September 2001?"
...1. Pentagon 2. World Trade Center, North Tower 3. Statue of Liberty 4. World Trade Center, South Tower At 8:46am, American Airlines Flight 11 crashed into the North Tower of the World Trade Center; United Airlines Flight 175 flew into the South Tower at 9:03am; American Airlines Flight 77 hit the Pentagon at 9:37am; a fourth hijacked plane, United Airlines Flight 93, failed to reach its Washington DC target because passengers fought the hijackers and cause the plane to crash into a field near Shanksville PA at 10:03am. Its intended target is not known, but speculation is that it was either the White House or the Capitol. These attacks cause the deaths of around 3000 people, mostly civilians, including 246 passengers on the four hijacked planes, 125 at the Pentagon and over 2500 in New York. The exact figures for New York may never be determined.