Emma Murphy meets the women often abandoned by their families and communities in India, as their large population ages and the women live longer than men there's an increasing number of widows left behind. Romilly Weeks is in Switzerland exploring the country's vast network of private and public bunkers built during the Cold War that are now having a renaissance as tensions in Europe rise. Lucrezia Millarini finds out how techno music has been recognised as a part of German culture.