business were the amezcua brothers of mexico. but no supermarket in the world could sell the amezcuas the tons of ephedrine their operation required. so where were they getting it? from the same factories where the american pharmaceutical industry bought the key ingredients in its cold medicines. 12 miles outde nellore, india, stands the krebs biochemicals factory. in 2005, in this warehouse alone, there was enough raw material to make ten million hits of meth. krebs was one of just nine factories that manufactured almost all of the world's ephedrine and pseudoephedrine. >> methamphetamine, unlike most other hard drugs out there, is uniquely susceptible to supply side intervention because it's not something you can grow. it's not something you get out of poppy fields or out of coca plants. it's something you gotta cook up in a factory, you gotta make this stuff.