When Mas Ayoob talks about this kind of stuff, smart people pay attention...
The general consensus of police, military, and national intelligence is that it’s only a matter of time before this nation experiences an incident reminiscent of Beslan or Mumbai: armed, trained, committed terrorists massacring the innocent with automatic weapons and explosives.
http://backwoodshome.com/blogs/MassadAyoob/2011/04/27/sobering-knowledge-from-cops/