How deadly drug fentanyl became a gold mine for Mexican cartels

Fentanyl addiction is a scourge that's sweeping the United States. This dangerous synthetic opioid, 50 times stronger than heroin, is exported from Mexico by drug cartels. With fentanyl, the cartels no longer needed to grow opium or rely on rural communities to produce it. Fentanyl is lightweight, discreet and easy to produce and transport. It can be passed off as a harmless...read more.