Open this photo in gallery: In 2008, a man pauses to look at 1,000 crosses during a vigil at Crab Park in Vancouver's Downtown Eastside. The crosses represent the lives saved by Insite, a supervised injection clinic that opened in the neighbourhood five years earlier.Jonathan Hayward/The Canadian Press In 2003, Vancouver was in the throes of a double-barrelled public health crisis. British Columbia had suffered a surge in overdose deaths, the majority of them in its biggest city, and an explosion of HIV and hepatitis C cases was disproportionately devastating the city’s injection drug users, the result of sharing syringes....