bruce snyder, computer security and privacy specialist at harvard law's berkman center for internet and society. good evening to both of you. bruce, let's start with the know-how here. the folks who did this that have some kind of, you know, i'm saying bruce, by the way, bruce from the c.i.a. since you're both bruce. the folks who did this have the know-how. does that go to how we figure out how tight they were with north korea bassed eed on your background u the knowledge of the espionage services there. >> right, we're still behind the investigation of north korea is behind it. but we're still waiting for that. north korea has, despite the perception of this very technologically backward nation, actually has a very active cyber warrior unit. probably 5,000 people in this thing called unit 121, part of