Will a bumper opium poppy harvest in Afghanistan make it even harder for NATO to beat Taliban insurgents? The UN believes a record harvest will provide a windfall for the Taliban, who tax farmers. US Secretary of State Condoleezza Rice is in London for talks with British leaders about a strategy for the country. Richard Douglas is the US deputy assistant secretary of defence for counter-narcotics and global threats. Stephen Sackur asks him if Afghanistan risks becoming a failed state.