This 26yo Grocery Store Bookkeeper Crushed the Soviet Spy Rings in the U.S.

Numbers made sense to Angeline Nanni in ways that words never could. While other girls her age worried about dresses and dates, twelve-year-old Angie kept perfect books for her father’s grocery store in rural Pennsylvania. She understood profit margins before she understood poetry. She could spot accounting errors that grown men missed. These skills would eventually help catch some of America’s most dangerous traitors.

But in 1945, sitting in a cramped classroom in Arlington, Virginia, Angie had no idea that her talent with numbers would change the course of the Cold War. She just wanted to keep her government job instead of going back to run a beauty shop with her sisters.

The test in front of her looked impossible. Rows of five-digit numbers that made no logical sense. Instructions about “non-carrying” subtraction that sounded like made-up math. Around her, college-educated women stared at their papers with obvious confusion. Angie had never heard of non-carrying arithmetic, but somet…