In August 1942, a concert took place in Leningrad that defies belief. A year earlier, the Germans had begun the deadliest siege in history which would kill three quarters of a million civilians. In the midst of the terror, a group of starving musicians assembled to perform Shostakovich's 7th Symphony in what would become a defiant moment in the city's ultimate survival. Historian Amanda Vickery and BBC Radio 3 presenter... see more