well, that's the amezcua brothers. the unraveling of their supply line was the key to knocking that mountain down. it happened purely by chance. >> march of 1994, a plane landed in dallas, texas, a lufthansa flight. customs officer went aboard just to see what the cargo was and discovered that there were 120 of these cardboard chemical-type containers in there. and then, he noticed that the company of origin, you could... you could almost read it through the top cover, but it had been painted over. and he pulled a sample and he called the d.e.a., and, next thing you know, it came up, it was 3.4 metric tons of ephedrine destined for mexico city that had landed in dallas en route. >> up until this point in time, the d.e.a. by its own admission did not even really have a clue that the amezcua brothers were obtaining hundreds of tons of ephedrine a year for the production of methamphetamine, much less how they were doing it. all of a sudden the d.e.a. has all the cards laid out in from of them and pretty much can see from