Why were those trains allowed to roll unhindered into Poland? Why were the tracks leading to Birkenau never bombed? I have put these questions to American presidents and generals and to high-ranking Soviet officers. Since Moscow and Washington knew what the killers were doing in the death camps, why was nothing done at least to slow down their “production”? That not a single Allied military aircraft ever tried to destroy the rail lines converging on Auschwitz remains an outrageous enigma to me. Birkenau was “processing” ten thousand Jews a day. Stopping a single convoy for a single night—or even for just a few hours—would have prolonged so many lives.