What major event happened on September 11, 2001, in the United States?
9/11 in new york
big sad day for the us
its also known as: "9/11"
the day that the twin towers in New York fell due to terrorists taking over planes full of ordinary people and flying them towards the twin towers.Causing trillions of dollars in damage repair.one plane was also heading for the white house on the same day but a very brave passenger fought the terrorists and steered the plane away from the white house into a jungle.