I stepped through a hole in the chainlink fence surrounding Portland’s O’Bryant Square and saw four people nodded out and three smoking fentanyl. The man who had supplied them was standing nearby; he gave me a nod and continued with his business.

Fentanyl is fifty times stronger than heroin and ruthlessly addictive

Built in 1973, the park is mostly brick and concrete with its dominant feature a bronze fountain in the shape of Portland’s iconic rose.