U.S. lacks system to monitor lethal street drug Tranq

Xylazine, a deadly new threat to Americans who use street drugs, is being mixed into fentanyl, methamphetamines, and other street drugs. Public health and law enforcement agencies around the U.S. are scrambling to blunt the impact of xylazine, but the effort is complicated by the fact that no one's sure who's mixing the dangerous chemical into street drugs. The lack of accurate, real-time data about emerging drug threats angers people on the front lines of the overdose crisis, which killed 110,134 people in the U.S. last year alone.