The September 11 attacks, commonly known as 9/11, occurred on September 11, 2001. The first plane, American Airlines Flight 11, crashed into the North Tower of the World Trade Center at 8:46 a.m. EDT. Seventeen minutes later, at 9:03 a.m., United Airlines Flight 175 hit the South Tower. At 9:37 a.m., American Airlines Flight 77 crashed into the Pentagon. The fourth plane, United Airlines Flight 93, crashed into a field in Pennsylvania at 10:03 a.m. after passengers attempted to overcome the hijackers