[mikeash]

And that 737 is in turn about 1/3rd the weight and fuel load of the 767s that crashed into the World Trade Center. That's about a factor of 10 difference in kinetic and chemical energy from that Falcon 2000. If 9/11 had been carried out with Falcon 2000s we'd be talking about good the repairs look and how you can barely tell where the holes were on the WTC towers.

I'm not calling the comparison unreasonable, I'm simply saying that the two are not the same, so it's perfectly reasonable for the security to be different too.