On Tuesday, September 11, 2001, terrorists seized control of four passenger aircraft and commandeered them. Two were piloted into the World Trade Center towers in New York City. One was crashed into the Pentagon in Washinton, D.C. The fourth, due to the courage of those onboard, ended its voyage in a field in Pennsylvania.
Every soul aboard these aircraft perished, along with upward of six thousand innocents in and around the buildings these planes hit.
I don't know how anyone could be unaware of these events by now. It was a bad dream we found wouldn't disappear, because we weren't asleep.