In the ongoing debate about whether the Allies should have bombed the Auschwitz extermination camp, the Soviet Union is rarely mentioned. Focusing on four operational challenges—accuracy, range, time, and intelligence—the authors compare British, American, and Soviet preparedness for such a mission. In addition, on the basis of little-used documentary evidence, they argue that Stalin’s refusal to bomb Auschwitz must be attributed not only to his antisemitism, but also to a complicated shift in the Soviet Union’s nationalities policy.