Which homegrown terrorists would those be, John?
You know, the ones they FLEW in, under the radar, and rolled out the red-carpets for...There were two from Boston recently...Russia gave the warning call and the U.S. govt (including the dip-shits that voted for the extension) turned a blind eye that allowed 4 Citizen deaths (yet, nobody in govt has been removed from office, jailed or even FINED) and numerous wounded. Can’t forget the Martial Law laid down and Citizens threatened (point a gun at the cops/soldier and see what happens).
Actually there have been some, gone to join ISIS, tried to blow up the "Draw Mo Hamhead Cartoons" contest, gamed by FBI to blow up building etc.