On March 20, 2024, Perry Center Professor Celina Realuyo testified on the topic of US efforts in disrupting the illicit fentanyl trade through cooperation with China and Mexico at a hearing titled “Strengthening International Cooperation to Stop the Flow of Fentanyl into the United States” before the United States Senate Homeland Security Committee Subcommittee on Emerging Threats and Spending Oversight. She emphasized the importance of cooperation from China and Mexico to curb illicit fentanyl flows that come from China and then are processed in Mexico destined for the United States. Professor Realuyo noted that although China and Mexico have resumed some counternarcotics cooperation with the US this past year, the US must “trust but verify” how committed the PRC and Mexico are to tackling the deadly fentanyl epidemic in the long run. She called on the US, China, and Mexico to intensify domestic and international efforts against the illicit fentanyl trade through the reduction of drug demand and supply, narcotics detection and interdiction, and anti-money laundering measures. She testified alongside Dr. Vanda Felbab-Brown from the Brookings Institution and DEA Special Agent(ret.) Christopher Urben.