How are the US and Mexico cooperating to combat fentanyl trafficking?

The US and Mexico are engaged in constructive cooperation through drone surveillance operations over Mexican territory to identify fentanyl labs. This intelligence-gathering mission allows authorities to collect information that is used to shut down these labs. This represents ongoing bilateral cooperation that exists despite political tensions and rhetoric between the countries. The program is non-lethal in nature, with Julian Castro emphasizing the importance of maintaining this cooperation while avoiding escalation to offensive military actions that could harm civilians.