There was a saying in Russia during Stalin that if there were three conspiritors at a meeting, one was a police spy. NOW, FOR VERY DIFFERENT REASONS, that seems to be the case in the USA. Sleeper Agents , from the islamofascist view, go bad and chose the materialism of the West over the "Garden with a River Beneath" of the martyr's grave.
Whereas in places like India , there is no positive pragmatic change possible yet. Reasons, time lapse between insertion and attack, and widespread poverty.
I suspect the next attack on the USA of any consequence will be chemical, biological of a dirty bomb. The ultimate goal, of course, is a nuclear device at NYC or WashingtoN DC.. San Fran , tho., is quickly becoming a secondary taerget.