EINDHOVEN, THE NETHERLANDS - JANUARY 30:M-209 is a light-weight portable pin-and-lug cipher machine, developed at the beginning of World War II by Boris Hagelin. Crypto AG, a predecessor of Crypto International, was a Swiss company that emerged from World War II with complex and secure code-breaking machines. The firm made hundreds of millions of dollars, selling equipment to nearly 130 countries. What none of those customers ever knew was that Crypto AG was secretly owned by the CIA in a highly classified partnership with German intelligence. (Photo by Jahi Chikwendiu/The Washington Post via Getty Images)

This week, we’re sharing stories from Greg Miller, Melissa del Bosque, Katherine Rosman, Laura Marsh, and Alexander Huls.

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