President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation, over the building of Hetch Hetchy Dam in Yosemite National Park.
The story of the farmers who dreamed of prosperity and lived through ten years of drought, dust, disease and death.
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 worldwide migration by eager gold-seekers turned California into a land of opportunity and fierce competition.
The most daring and innovative accomplishment at the turn of the 20th century.
A biography of the last outlaws of the American Wild West
In 1927, the Mississippi River flooded from New Orleans to Illinois, leaving a million people homeless and leading to a major black migration to the North.
The Klondike Gold Rush in Canada's Yukon Territory saw 100,000 people make the treacherous journey in search of riches.