on the table next to where the other russian diplomat is sitting. he picks up the phone and says, let dmitry in. she hangs up, writes it off. off he goes, and where he went we have no clue. in this case unfortunately we did not have an asset able to follow. >> doing surveillance of the outside of the state department is easy. doing surveillance on the inside of the state department, very, very difficult. sometimes it's just two of you going down a hallway and, you know, you can get away with that only so long. >> why didn't you get rid of them, kick them out, arrest them? >> well, they violated no laws. they have violated an internal security rule, sure. but if you do that, you let them know you're onto them. let them do it a second or third time, let's see what's going on