Numbers
Date of attack: 9/11 - 9+1+1=11
September 11 is the 254 day of the year: 2+5+4=11
After Sep. 11 there are 111 days left in the year
119 is the area code to Iraq/Iran: 1+1+9=11
Twin Towers standing side by side looks like 11
The first plane to hit the Towers was Flight 11
NY was the 11th state added to the Union
New York City -11 letters Afghanistan-11 letters
The Pentagon-11 letters
Flight 11-92 on board: 9+2=11
Flight 77-65 on board: 6+5=11