On the Mexico-US border, fentanyl poses a growing hidden danger

Elena Ruelas prepares heroin for injection in a safe space in Mexicali, Northern Mexico Elena Ruelas prepares a syringe of heroin, a drug she has been using for 20 years. These days, however, she\’s almost certainly hooked up with potentially deadly fentanyl. A rapid strip test at a Mexican safe-use center in the city of … Read more