Prevention, treatment, harm reduction, and enforcement—Vancouver’s four pillars. It’s the most progressive drug plan of any city in North America. But its authors fear that the pillars are crumbling. This is part one of the Four Pillars Revisited. Our 5-part season-opener, produced by our sister site (terry.ubc.ca) in partnership with The Tyee, and syndicated at the University of Victoria and Simon Fraser University in Burnaby. Subscribe on iTunes  | MP3 | RSS | Download our Smartphone App | Listen on CiTR 101.9FM: Every Thursday, 5PM To read more and hear extended interviews, please click here.