Kate Adie introduces Correspondents' stories from around the world. Today Ukrainian journalist Andriy Kulykov wonders why silence is the order of the day with the armed men of Crimea. Peter Day is in industrious South Korea where they are trying to make the place more relaxed. Damien McGuinness visits a mega-brothel in Germany, where prostitution has been legal for over a decade, but he questions if much has really changed. We take a remarkly tourist-free ride down the Nile with Robin Denselow; it's good for him but not so good for Egypt. And Charlotte Ashton discovers why Singapore is at the bottom of the happy pile.