Goddard confirmed his work was used by von Braun in 1944, shortly before the Nazis began firing V-2s at England. A V-2 crashed in Sweden and some parts were sent to an Annapolis lab where Goddard was doing research for the Navy. If this was the so-called Bäckebo Bomb, it had been procured by the British in exchange for Spitfires; Annapolis would have received some parts from them. Goddard is reported to have recognized components he had invented, and inferred that his brainchild had been turned into a weapon. Later, von Braun would comment: "I have very deep and sincere regret for the victims of the V-2 rockets, but there were victims on both sides ... A war is a war, and when my country is at war, my duty is to help win that war."