The U.S is cracking down on fentanyl\u2019s global supply chain by targeting Mexican and Chinese individuals with indictments and sanctions. Officials from those countries insist it\u2019s largely an American problem.\n\nWhat\u2019s actually happening on the ground in China and Mexico? What impact will U.S. retaliation have?\n\nToday, journalist Zachary Siegel explains.\n\nFor transcripts of Front Burner, please visit: https://www.cbc.ca/radio/frontburner/transcripts\nTranscripts of each episode will be made available by the next workday.