Everywhere women were attacking enemy messages pouring in via airmail, cable, and teletype. The messages originated in Nazi Germany, Japan, Italy, occupied Vichy France, Saudi Arabia, Argentina, even neutral countries like Switzerland, sent between top political leaders and military commanders. At the Allied listening stations where the messages were secretly intercepted, American operators further encrypted them using their own encoding machines. Once they got to Arlington Hall, the messages had to be stripped of the American encryption before they could be stripped of the underlying enemy
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