The first around-the-world air race was sponsored to prove that the airplane had a commercial future. Four pilots took off from Seattle and two returned 175 days later.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
During the Great Depression, Americans built the Hoover Dam, one of the greatest engineering works in history.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
The unusual life of David Vetter, who lived permanently inside a germ-free environment due to severe combined immunodeficiency.
Brothers Wilbur and Orville Wright built a flying machine that made its first flight in Kitty Hawk, North Carolina in 1903.
While the U.N. debated strategies for control of atomic energy, the U.S. Navy was preparing for nuclear tests on Bikini Island.
The Alaskan Highway stands today as one of the boldest homeland security initiatives ever undertaken.
The Pennsylvania Railroad Company accomplished an enormous engineering feat, but destroyed a great architectural monument.