New report details the scale of the U.S. opioid crisis

The opioid overdose crisis that killed more than 100,000 Americans in a year is being called one of the most pressing national security and public health challenges facing the U.S. A majority of the overdoses are driven by the potent synthetic opioid fentanyl. Maryland Rep. David Trone, co-chair of the federal Commission on Combating Synthetic Opioid Trafficking, joins William Brangham to discuss.