Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
At the height of segregation, an unlikely alliance between a black medical genius and a white surgeon led to a pioneering medical breakthrough.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
During the Great Depression, Americans built the Hoover Dam, one of the greatest engineering works in history.
The contradictory history of a dam that became a statement of American power and prestige.
While the U.N. debated strategies for control of atomic energy, the U.S. Navy was preparing for nuclear tests on Bikini Island.