It's 75 years since the founding of Nato. In 1949, a group of 12 countries formed the North Atlantic Treaty Organization to block the expansion of the Soviet Union. Professor Sten Rynning, the author of Nato: From Cold War to Ukraine, talks about some of the most significant moments in Nato's history. It's 30 years since the beginning of the Rwandan genocide. We hear from one of the survivors, Antoinette Mutabazi. This programme contains disturbing content. Plus, Riyaz Begum reflects on Britain's Mirpuri migration, Janet Heimlich, daughter of Dr Henry Heimlich talks about the origins of the Heimlich Manoeuvre and Adam Trimingham, Brighton based journalist and nudist David Johnson recall the arrival of Britain's first nudist beach. (Photo: British Foreign Secretary Ernest Bevin signs the North Atlantic Treaty. Credit: Keystone/Hulton Archive/Getty Images)