I think it was because some Arab-Muslims mass murderers hijacked airliners and crashed them into the towers. The planes were filled with many thousands of gallons of highly flammable jet fuel and that the Arab-Muslim mass murderers were counting on the jet fuel to incinerate the building.

I also don't beleive that a NYC fireman would tell you that.

BTW, my brother died in the WTC on 9/11 and I'm offended by your post.