By Lynn Arditi, The Public’s Radio, KFF Health News In Pawtucket, Rhode Island, near a storefront advertising “free” cellphones, J.R. sat in an empty back stairwell and showed a reporter how he tries to avoid overdosing when he smokes crack cocaine. KFF Health News is identifying him by his initials because he fears being arrested for using illegal drugs. It had been several hours since his last hit, and the chatty, middle-aged man’s hands moved quickly.