>> kendis, i think, look, the key thing about hypersonic, they're a lot faster than traditional nuclear weapons delivery, whether bombs or submarines, they're morage ill. they can evade defenses, move around quickly. they're gliding in once they come in from outer space in the atmosphere, and they're able to be very precise. evade. we should be very concerned. this is a new development. china has been doing hyper sonics for a while. in 2018 it was testified there were testing 20 times more hyper sonic weapons than we were and they're growing their nuclear force. the third largest in the world. a lot less than the u.s. and russia combined. they've got this capability and way of delivering it that's very dangerous. that's a real concern for the united states. >> a lot of people say the most concern right now is about this new weapon system, is that it could be capable of evading our missile defense systems. is the u.s. preparing in any way for this?