CLIFF MAY:

Investigators now think that the attacks were carried out by homegrown extremists using low-tech explosive devices.

The attacks of 9/11/01 were highly sophisticated and killed thousands. The attacks of 3/11/04 in Madrid were somewhat less sophisticated and killed hundreds. The attacks of 7/705 appear to have been the work of amateurs and killed dozens.

Anyone see a pattern here?

Let’s hope.