How would you respond

...if you were told September 11 happened because the world's top terrorist was believed to be holed up in the WTC?

...to this then?

And think about this as well - Protocol I, Article 85, Sections 3 & 5 of the Geneva Convention state that:

"In addition to the grave breaches defined in Article 11, the following acts shall be regarded as grave breaches of this Protocol, when committed wilfully, in violation of the relevant provisions of this Protocol, and causing death or serious injury to body or health: (a) making the civilian population or individual civilians the object of attack; (b) launching an indiscriminate attack affecting the civilian population or civilian objects in the knowledge that such attack will cause excessive loss of life, injury to civilians or damage to civilian objects, as defined in Article 57, paragraph 2 (a)(iii); (c) launching an attack against works or installations containing dangerous forces in the knowledge that such attack will cause excessive loss of life, injury to civilians or damage to civilian objects, as defined in Article 57, paragraph 2 (a)(iii); (d) making non-defended localities and demilitarized zones the object of attack; (e) making a person the object of attack in the knowledge that he is hors de combat; (f) the perfidious use, in violation of Article 37, of the distinctive emblem of the red cross, red crescent or red lion and sun or of other protective signs recognized by the Conventions or this Protocol." (Emphasis added)

"Without prejudice to the application of the Conventions and of this Protocol, grave breaches of these instruments shall be regarded as war crimes."

Update: The Acorn does what it does best.