Philadelphia’s Kensington neighborhood is the East Coast’s largest open-air drug market whose strong, inexpensive heroin attracts drug users from all over the country. Some locals commute there to score. Some work as guides, helping visitors shop and procure clean needles. The overdose rate is high. Rape, murder, and violence are common. Dead bodies end up in the bushes. As one user put it: “People think we are having fun down here. Are you insane? I live under a bridge.” The city doesn’t know what to do about it.