Jessica, a homeless heroin addict, shows her kit of clean needles, mixing cap and tourniquet in the Kensington neighborhood of Philadelphia, Pennsylvania, on April 14, 2017. In North Philadelphia, railroad gulch as it is known, is ground zero in Philadelphia's opioid epidemic. 80 percent of us want to get out,' said Jessica, before outlining the numerous ways she has tried to get treatment for her addiction. In one case, she said, there weren't any available beds. In another, a treatment provider required a positive drug test before delivering aid, meaning if she hadn't used recently she'd be denied. Instead of getting treatment, she spends her nights trying to keep warm on a mattress under a bridge, the very spot where she was raped and infected with HIV. People come from throughout the city, and some as far away as the Midwest, for heroin that is remarkably cheap and pure at the largest heroin market on the East coast. / AFP PHOTO / DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)