Just a short trip up the road from Nogales Mexico where enough fentynal comes across to kill everyone in Tucson.
Probably enough to kill everyone in NORTH AMERICA.
The lethal dose of Fentanyl is around 2 milligrams, and I’m pretty sure the Mexican cartels don’t care about ‘accuracy’ in the labs........... ............
https://www.dea.gov/resources/facts-about-fentanyl