B-17 bombers of the USAAF VIII Bomber Command planned attacks on Hannover and Hamburg, Germany, but both missions were recalled after launch due to poor weather. 33 of the bombers attacked targets of opportunity after receiving the recall order; 21 of them attempted to attack the Fokker factory at Amsterdam, the Netherlands but accidentally dropped bombs on civilian quarters, killing 150. On the same day, B-26 bombers of US VIII Air Support Command attacked Cayeux, France as a diversion to draw German fighters away from the primary targets in Germany.
