911 is the number to dial for emergencies, 9 + 1 + 1 = 11

The date of the attack: 9/11 - 9 + 1 + 1 = 11

September 11th is the 254th day of the year: 2+ 5 + 4 = 11

After September 11th, there are 111 days left to the end of the year.

119 is the area code to Iraq/Iran. 1 + 1 + 9 = 11

Twin Towers standing side by side, looked like the number 11

The first plane to hit the towers was Flight 11

State of New York - the 11th State added to the Union

New York City - 11 letters

The Pentagon - 11 letters

Afghanistan - 11 letters

Ramzi Yousef - 11 letters (convicted for orchestrating the attack on the WTC in 1993)

Flight 11- 92 on board - 9 + 2 = 11

Flight 77 - 65 on board - 6 + 5 = 11

Last but not the least, GEORGE W BUSH = 11 letters.