Kevin Sites in the Hot Zone - TEHRAN -- In the unforgiving world of heroin addiction, 43-year-old Ali is a model of self-restraint. Anybody that is still alive after doing smack for 22 years -- an endless cycle of searching, scoring, shooting -- must know how to hold back a little. "Most of my friends are already dead," he says during an interview inside the Persepolis Harm Reduction Center, off a back alley in a shabby part of Tehran. "But since I was working I didn't overdose."]]>{br}{br}View the Entire Article{br}{br}Click Here to Launch in a new Window