The summer of 1940 was supposed to be the beginning of the end of Britain. Europe had fallen to Hitler's storm troops with terrifying speed, and once the Royal Air Force was destroyed, Britain was next. But that was precisely where the Nazis stumbled. For 123 days, while Herman Goering sent wave after wave of Luftwaffe fighters to rain down fire on Britain, three thousand young RAF airmen fought back with a ferocity and agility that stunned the world...