During the Great Depression, Americans built the Hoover Dam, overcoming technical challenges to erect 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.
Robert Noyce's invention of the microchip launched the world into the Information Age.
The internationally famous carnival of delights in New York was the birthplace of the hot dog and the roller coaster.
The contradictory history of a dam that became a statement of American power and prestige.
The ultimate frontiersman, Carson inspired popular novels before being associated with the "Long Walk" of the Navajo people.
In 1960, Francis Gary Powers' U-2 spy plane was shot down over the Soviet Union.
In the early 1830s, Texas, ruled by Mexico, held 20,000 U.S. settlers and 4,000 Mexican Tejanos, forcing residents to pick sides.
George Eastman introduced the Kodak and Brownie camera systems and transformed photography into something anybody could do.