It would be the "Biggest Thing on Earth," the salvation of the common man, a dam and irrigation project that would make the desert bloom, a source of cheap power that would boost an entire region of the country. Of the many public works projects of the New Deal, Grand Coulee Dam loomed largest in America's imagination during the darkest days of the Depression. It promised to fulfill President Franklin Roosevelt's vision for a "planned promised land" where hard-working farm families would finally be free from the drought and dislocation caused by the elements.
Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
The New Deal program CCC put three million young men to work in camps across America.
A biography of the last outlaws of the American Wild West
The coal miners' battle for dignity led to the largest armed insurrection since the American Civil War.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
Postwar New York City and the global economic order told through the story of the World Trade Center.
The grave truth behind modern forensics was discovered in 1920s New York.