'The final asembly department in one of Douglas Aircraft Company's California plants, where deadly attack-bombers are poised over work carriages set in tracks. By day and by night, these craft are raiding Nazi bases in occupied Europe, blasting Rommel's tanks and troops in Libya, flying against the Japs in the far East, and helping heroic Rusians fight the invaders.' From the time when the United States entered World War II after the Japanese attack on Pearl Harbour in December 1941, the US economy was mobilised to manufacture huge quantities of military equipment. By 1944 the annual output of aircraft stood at 95,000 planes, 20 times what had been produced in 1940.
© Daily Herald Archive / National Science & Media Museum / Science & Society Picture Library