Text is from an existing Air Service poster produced by Office for Emergency Management. War Production Board. (01/1942 - 11/03/1945) https://commons.wikimedia.org/wiki/File:You_give_us_the_%22fire%22_we%27ll_give_%60em_hell%5E_Let%27s_go,_everybody_-_Keep_%60em_firing%5E_-_NARA_-_534753.jpg