Southern Minnesota's Lois Widmark, 104, played a key role in helping the Allies gain victory in World War II.

At Arlington Hall, women on the Venona Project exploited a Soviet cipher flaw to expose Cold War spies, a secret that remained hidden for decades.

In early February of 1943, Gene Grabeel walks toward a corner of a large, crowded room inside Arlington Hall near Washington, D.C. Around her, clutches of people huddle over tables and quietly rifle ...