In 1960, Francis Gary Powers' U-2 spy plane was shot down over the Soviet Union. The plane had provided a high-tech peek behind the Iron Curtain during the Cold War.
The international race to develop biological weapons during the 20th century.
An American Communist family that had fled to Moscow in the late 1920s, return to America in 1935 but can not bring their 5-year-old son.
The story of the polio crusade pays tribute to a time when Americans banded together to conquer a terrible disease.
In the Philippines, Army Rangers liberated 513 prisoners of war three years after the Bataan Death March.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
Accounting for America's most famous inventor and his role in America's future.
Robert Moses fueled some of the most ambitious -- and controversial -- public works projects ever conceived.
Two days in 1967 revealed a nation divided over a war that continues to haunt us.