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September 11, 2001 was a Tuesday.
The twin towers collapsed on September 11, 2001.
Well, in 2001, there was a big war, terrorists attacked the twin towers, on September 11. it was a day we never forget. :(
The September 11 attacks occurred on September 11, 2001.
http://911billofrights.blogspot.com
We invaded Afghanistan and declared war on Al Quaeda.