[blam]

"Which leads me to wonder why such a low-tech attack when presumably they had the education and access to resources for some really nasty bio or chemical weapons."

Yup. Something seems to be missing here...like common sense. They were looking for a firey, showy explosion...images.

[Dog]

They were trying to get cute by setting off a fuel air explosion....not a normal car bombing. The timing was off....if it had worked....hundreds would have been dead in London alone.

The Brits got lucky.