In September 11, 2001 four airliners were hijacked and were headed out to targets in the united states. Two of the planes were flown into the the towers of the world trade center in New York City. The third plane was hit the Pentagon just outside of Washington D.C. The forth plane crashed into a field because passengers had heard about the incidents that happened in New York so they new they were not going to come back alive. The passengers then attacked the cockpit with fire extinguishers and fought the terrorists. The plane then flipped over crashing on a field in Pennsylvania. The terrorists target is unknown but theories include the white house, the U.S Capitol, the Camp David presidential retreat in Maryland or one of several nuclear power plants along the eastern seaboard.