Kate Adie introduces correspondents' stories from around the world. This week, with American and British combat troops soon to leave, the author and historian William Dalrymple gives his assessment of where the latest military intervention into Afghanistan fits into the country's troubled history. Quentin Sommerville attends the court hearing of some Al-Jazeera journalists in Egypt and finds the prosecution less than convincing. Linda Pressly is in Uruguay to see if legalising marijuana will help tackle the problem of hard drugs. In India, Ed Butler spends time with sleuths of a special kind - the wedding detectives. And Stephen Smith re-visits Italy's Renaissance with its ruffs, doublets and, of course, cod-pieces.

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