Mexico's seizures of US-bound fentanyl drop precipitously

Fentanyl made in Mexico kills nearly 75,000 people in the US annually, according to the CDC. Yet a report just issued by the US Defense Department shows that Mexican seizures of US-bound fentanyl have dropped dramatically. What has gone up are Mexican seizures of meth. Host Marco Werman explores why with Chris Dalby, the director of World of Crime, a think that investigates transnational organized crime. He's also the author of "CJNG: A Quick Guide to Mexico's Deadliest Cartel."