working very closely with mexican counterparts and counterparts throughout latin america, those dnm assets left for more parts of the world where they were desperately needed at the time and they've never returned. i would like to clarify one thing. >> real quick. >> dea and fbi, federal law enforcement are prohibited from posing as journalists while conducting undercover operations. >> wow. that to me seems absurd. i think police officers ought to be able to use any means necessary to get big drug dealers. that is something they ought to reconsider. thank you for what you do and thank you for being on the program. coming up you'll hear from a former chicago gang member who sold el chapo's windy city. how far did the drug empire extend into the u.s.? that is coming up next. the understand the magnitude of the engineering feat involved. look how far it is to the prison