In 1941, Glen Edwards learned to fly in a fabric-covered biplane. Seven years later, he died in the crash of the Northrop YB-49 Flying Wing, the Air Force's most advanced jet-propelled aircraft and forerunner of the B-2 Stealth bomber of today. As a combat pilot in North Africa and Italy during World War II, and as a test pilot during a period of astonishing innovation, Edwards was among the best of a new generation of military aviators. The isolated...