el chapo's arrest did not stem the flow of narcotics across the u. s. border, and there were nearly 30,000 murders in mexico in 2017. at the time, a record for that country. most of the killings were linked to drug violence, and the cartels are evolving, becoming key suppliers of the fentanyl that is wreaking havoc on the streets of america. >> enforcement is only one piece of the problem, right? i'm very confident that we've made a difference. but the reality is, is that unless you stop the demand, these young kids that are getting addicted that have no idea what they're taking, this is going to be a very long battle. it starts with the schools, the educators. we need to have a full court blitz on this problem. >> even though he left the dea in 2014, drew still has security concerns. afraid? >> no. i wouldn't say afraid. just hyper aware, ready for anything. >> and ready for his place in law enforcement history. a dea agent who was obsessed with the hunt for the most wanted drug lord in the world. >> i think that's where people had gotten caught up bef

. >> diane was barely out of high school when she went to work at u. s. enterprises, a company in atlanta. she was a bookkeeper, but soon caught the eye of her boss, billy corey. >> there were some people working there that weren't really doing their jobs, and she told him she could do their job and her job. i think he fired them and she did their job. >> it was back in the'80s when dani jo and diane first teamed up. best friends and confidants. dani jo was a cosmetologist with a front row seat to diane's brilliant career. >> she loved crunching numbers. and along with billy corey, i think she learned how to wheel and deal. >> she rose through the ranks. and with her boss'blessing became president of the company. hiring, firing, and calling the shots. >> she would say, i don't want to hear about the labor pains, just show me the baby. >> jay grover was a vice president at diane's company. >> when she started in business here in atlanta, there were not a ton of female executives. >> no. absolutely. and i think that's what -- one of the things that really s