Iraq's oil-rich southern province, Basra, is in the grip of a crystal meth epidemic. High levels of unemployment, poverty and despair are fuelling the crisis, along with plentiful, cheap supplies of the highly addictive drug. Yalda Hakim has gained exclusive access to Basra's police SWAT team, and the prison where dealers and addicts are all kept in the same cell. She reports on the authority's tough approach to drug-related crime