cyberattacks that the u.s. is one of the most prolific if not the most prolific of cyber warfare. we published the drebtive signed in october that lays forth a very aggressive tactic of when they will use it. it as china that the u.s. has directed those accusations at most. and yit the oust is a very active in hacking into chinese research facilities, university, businesses and ones in hong kong as well. >> glen greenwald, i appreciate talking to you. thank u let's dig deeper into this. john, you saw what snowden said in that interview, does the u.s. government really have any idea where he is at this point? >> i think they have a pretty good idea where he is. this is the kind of thing that not yesterday or the day before, but at the very beginning of this fbi headquarters would have likely called the fbi legal