In the summer of 1943, British and American bombers launched an attack on the German city of Hamburg that was unlike anything the world had ever seen. For ten days they pounded the city with over 9,000 tons of bombs, with the intention of erasing it entirely from the map. The fires they created were so huge they burned for a month and were visible for 200 miles. The people of Hamburg had no time to understand what had hit them. As they emerged...