News Fentanyl killed 70,000 in US. With Biden in Mexico, can neighbors cooperate to stop flow? January 8, 2023Josh Meyer, USA TODAYComments Off on Fentanyl killed 70,000 in US. With Biden in Mexico, can neighbors cooperate to stop flow? President Joe Biden heads to Mexico next week to discuss lethal fentanyl threat with Mexico's president. Analysts say U.S. needs much more cooperation