Trapped by the ‘Walmart of Heroin’

Feature A Philadelphia neighborhood is the largest open-air narcotics market for heroin on the East Coast. Addicts come from all over, and many never leave. Drug users under the Kensington Avenue underpass. Credit Credit Jeffrey Stockbridge for The New York Times The first time Mark shot up “Philly dope” was in the summer of 2017, with his girlfriend, Sarah.