Really tires of the talk about "sleeper" terrorist cells in the US. If there are, they must be the dumbest, most worthless terrorists ever. What the hell are they waiting for? As we saw with the Aurora, CO shooting, even 1 man with a gun can do lots of damage, a couple terrorists armed with ak-47's can much more damage in a crowded place. There are plenty of resources to use if they wanted to have a mass casualty event, yet we haven't seen it yet.

So, what are they waiting for?