Exactly. And one doesn't need suicide bombers for that sort of thing. Backpack bombs and exploding cars will do fine. Imagine what a few dozen carloads of these maniacs with mortars, ATRs and machine guns could do. This country is totally open to mayhem by these people.
Except for the fact that over 100 million American citizens are armed and that there is no where to hide for these scum in the US. They cannot "melt into the civilian population" because they stick out like sore ragheads.