Correspondents' stories from around the world, introduced by Kate Adie. Today: Will Grant meets El Salvador's only forensic archaeologist, with the unenviable task of unearthing and identifying murder victims; Emma Jane Kirby is in a French border town, discovering why the Front National is gaining support; Karen Allen visits the former Taleban capital of Kandahar where businessmen are in desperate need of more power; Alex Preston, in Sri Lanka, finds out why rugby is becoming so popular; and Susannah Knights is with the musicians and performers of Tunisia who are poor but flourishing in their new found freedom.