A land of secrets: Neil Trevithick tells a story of Cambodians living amongst their parents' killers who don't even know it. The obstacles to free and fair elections, a view from John Leyne in Cairo. After twenty years of anarchy, Andrew Harding finds there's hope of a new start in Somalia. In Louisiana, Paul Adams finds out why oysters maybe hard to find this Christmas. And Pascale Harter travels to sun-blasted Djibouti where the locals are always thirsty.