Rebel fighters who are now part of Syria's new de facto government have been destroying large shipments of Captagon, an addictive drug that was mass produced by the ousted Assad regime.

What would it mean to classify Mexican drug cartels as "foreign terrorist organizations"? NPR speaks with Mike Vigil, former chief of international operations for the DEA.

FADEL: I wonder, as somebody who studied this group and studied Syria, the consequences of taking them off too early. ZELIN: I mean, I think one of the issues that many people are worried about is ...

As Syria emerges from civil war ... And so it is important to have both of these elements. LEILA FADEL, HOST: You know, I covered Iraq for a long time, and so much that Hay'at Tahrir al-Sham ...

As Syria emerges from civil war ... And so it is important to have both of these elements. LEILA FADEL, HOST: You know, I covered Iraq for a long time, and so much that Hay'at Tahrir al-Sham, the new ...

In Syria, new leaders are settling in ... DANIEL ESTRIN, BYLINE: Happy New Year, Leila. FADEL: Hadeel, let's start with you. These comments were made to you in a recent interview you did with ...