Apart from that, he has limited the ability of d.e.a., fbi and other agencies to do what we were doing in the past in helping stem the flow of drugs from mexico into the united states. >> mike vigil, so many other questions i would love to ask you. come back soon. we appreciate you taking the time. thank you. >> thank you, chris. as the top intel chief's testify on capitol hill about the growing threat of china, we're also learning more about the daunting and potentially deadly effort to find out what's actually going on behind the scenes in beijing. nbc's dan de luce joins us with that new ...