After siblings swept away by Pennsylvania flooding, body of young girl found in river

If you show up at 6189 Sixth Avenue, in Whitehorse, you’ll ring a doorbell to be let in. To protect your privacy, you’ll be asked to pick a code name—favourite movie characters or favourite foods are popular choices. If it’s your first visit, you’ll do a brief intake at the welcome desk, where staff will ask if you have any medical conditions or have had any bad drug reactions. They’ll also ask which drug you’re using that day, and whether you’d like the substance checked to confirm that you’re consuming what you think you’re consuming. Then you’ll queue for one of the three tables in...