Asian migrants in limbo at sea

Thousands of migrants from Myanmar and Bangladesh are making their way across unfriendly seas to countries which are reluctant to receive them. What's caused this sudden increase in their numbers? And what fate awaits them now? Also in this podcast: Obama extends a peace feeler to Russia; how Liberia defeated ebola; how secular bloggers in Bangladesh were caught by the law of unintended consequences; and what ancient Rome teaches us about modern North Korea.