The 2nd remotely controlled plane just before it crashes into the WTC. Notice the odd shape under the fuselage, at the level of the wings.

Was the strange attachment on the plane actually an extra fuel tank filled with gasoline, for creating a big fire and huge media show? Such tanks can be seen on many army aircrafts, but have never been seen on a Boeing 767 which normally has no fittings (so called "hard points") to fix such a tank to... The tank could also have been a pod from which a missile was fired...

How come a plane could have taken off without anyone noticing the odd extra tank/pod? How probable is it some foreign hijackers "customized" a Boeing 767 in this way for their purpose?