Or drive his own truck stacked to the roof with barrels of gasoline.
Which do you think would more likely take down a building and kill more people: 1) a U-Haul truck, big one, filled past gross weight with barrels of gasoline and driven into the lobby of that building. or 2) a four seat airplane, filled past gross weight with every ounce it can hoist off the ground with gasoline flown into the side of the building?
Since the truck would haul, oh, maybe 25-35 times more gasoline, and it would go off inside the ground floor trapping everyone inside, I vote that U-Haul trucks are far more dangerous.
Oh, and how many potential terrorists are trained to drive airplanes vs. know how to drive a truck? How easy is it to get a U-Haul vs. get an airplane?
Come on people, think.