The Iron Curtain - a podcast by BBC World Service

Churchill's Iron Curtain speech about the Cold War, the Sharpeville massacre in South Africa which radicalised many anti-apartheid movements and we hear from a man whose relatives were killed when police bombed the home of African-American radicals in the US. Plus how Nauru became a Pacific island limbo for asylum seekers and the first man to dive to the deepest point on the planet - the bottom of the Mariana Trench. We'll also hear from a BBC science correspondent about why we know more about space than the deepest depths of the ocean.Photo: Winston Churchill at the podium delivering his "Iron Curtain" speech, at Westminster College in Fulton Missouri, 5th March 1946 (PA)

Further episodes of The History Hour

Further podcasts by BBC World Service

Website of BBC World Service