Interior of a He 111 P bomber while in flight over France, mid-May 1940A Flak 18 gun and its crew in Belgium, May 1940; note British Morris C8 tractor and German BMW R18 and DKW NZ350 motorcycles in foregroundGerman General Heinz Guderian (in SdKfz. 251/3 halftrack vehicle) speaking with General Adolf Kuntzen of 8th Panzer Division, France, May 1940German General Heinz Guderian in a SdKfz. 251/3 halftrack vehicle, France, May 1940, photo 1 of 6; note early 3-rotor Enigma machine