We are slowly and inevitably losing the generation of men who fought in and survived the last world war. HARDtalk’s Stephen Sackur speaks to 96 year old George ‘Johnny’ Johnson – the last remaining British survivor of one of the most extraordinary and most famous aerial missions of World War 2 - the Dambusters raid. It was costly and not entirely successful. So why has it become such a part of Britain’s national folklore?
