As Franklin Delano Roosevelt's special envoy to Europe in World War II, Anna Rosenberg went where the president couldn't go. She was among the first Allied women to enter a liberated concentration camp, and stood in the Eagle's Nest, Hitler's mountain retreat, days after its capture. She guided the direction of the G.I. Bill of Rights and the Manhattan Project. Gorham shows that Rosenberg was the real power behind national policies critical to America...