HAVANA (AP) — Several dozen people stood in circle in a room at a Havana psychiatric hospital, their hands held together as they chanted in unison, vowing to rid their bodies from “the toxins that enslave. ” The collective plea to reclaim their freedom for just the next 24 hours was the first step of a 90-day detoxification before beginning rehabilitation. Drug use was an almost-unknown phenomenon in Cuba until the beginning of this decade. However, a deepening economic crisis, shortages...