The September 11 attacks were suicide attacks by Al Qaeda on the United States.At 8:46AM,American Airlines Flight 11 crashed into the World Trade Center's North tower.At 9:03AM,United Airlines Flight 175 crashed into the World Trade Center's South Tower.American Airlines Flight 77 crashed into the Pentagon in Arlington,Virgina.United Airlines Flight 93 was flying to Washington D.C. to smash into the United States Capitol or the White House but instead it crashed near Shanksville,Pennsylvania.The South Tower collapsed at about 9:59AM and the North Tower collapsed at about 10:28AM.3,017 people died in these attacks(including 19 hijackers and 24 presumed dead) and over 6,921 people were injured.