in five minutes, shoot it very quickly. it's incredibly mobile. then on the other hand, there's the fact it is an incredibly sophisticated missile system, though it's not the most sophisticated in the russians' arsenal. you know a lot about this. how easy is it for someone to train and operate the buk? >> six months. >> six months. >> the army uses about a six-month training period for someone to operate a system this complicated. now, to believe this was given to the separatists and they were able to operate this just defies logic for me. the russians either had to take them to russia, train them, and take them back. so we're talking about a six-month time. or the russians sent advisers in, advisers in quotes, to run the isle f system for them. >> your belief they sent the advisers in themselves. when you look at the length of the conflict, there isn't the six-month leave time. >> as we get more intelligence