 Welcome. This is Weekend here on the BBC World Service. I'm Paul Henley, and it's the point in the programme where we introduce two guests who are with us for the course of the programme to give their takes on nearly all the issues we cover. Today, I'm joined here in the studio by Leslie Vinger-Moury, who is Director of the US and Americas Programme at Chatham House, the famous London think tank, and also Professor of International Relations at SOAS, the University of London, and