The U.S is cracking down on fentanyl’s global supply chain by targeting Mexican and Chinese individuals with indictments and sanctions. Officials from those countries insist it’s largely an American problem. What’s actually happening on the ground in China and Mexico? What impact will U.S. retaliation have? Today, journalist Zachary Siegel explains. For transcripts of Front Burner, please visit: https://www.cbc.ca/radio/frontburner/transcripts Transcripts of each episode will be made available by the next workday.