The World Tonight - 24/12/2009

National and international news and analysis with Robin Lustig. In a special edition, the focus is on drugs: how to control the cultivation of drugs, how to smash the trade in drugs, and how to treat drugs users. The programme looks at each of the issues in turn - hearing from Afghanistan, which produces nearly all of the world's opium; from Nigeria, a major transit route for the international trade in drugs; and from drugs users in the UK.