Which is what I think is funny about this whole "drone vs model" crap, they are talking about planes even the largest of which frankly isn't gonna be able to carry enough payload to do even a tenth the damage of a Rider truck with fertilizer. If there is anything we should have learned from OKC its that low tech does a hell of a lot more damage while being easy for even the dumbest terrorist to construct. And I'm sure that if you counted up every vehicle used for combat out there? Drones wouldn't even be in the top 50, probably not even in the top 100 when it comes to terrorists, its technicals and bomb trucks.
This is just another case of "Hollywood scenario planning" where the government treats the high tech shit they see on NCIS and 24 and treat it as a legitimate threat because they can't/won't admit the truth.....which is that what makes terrorists effective is the fact they can take pretty much anything and make it a weapon. If you want to see what terrorists weapons are like you should look at the crazy IEDs the military has disarmed in Iraq, everything from copies of late WWII German wooden mines made out of footlockers and packing crates to paint cans filled with homemade explosives and metal scraps and rigged to a beeper, what makes terrorism so hard to stop isn't them using high tech shit, its just the opposite, they often go so low tech that you'd have to ban pretty much all agriculture and household cleaning products to stop 'em.