When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
High on a granite cliff in South Dakota's Black Hills tower the huge carved faces of four American presidents: George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.
A daunting story of shipwreck, starvation, mutiny and cannibalism amongst a group left abandoned in the high Arctic.
The contradictory history of a dam that became a statement of American power and prestige.
Vivid memories of those trapped in the terrifying temblor of 1906 that killed thousands of Californians.
The story of the farmers who dreamed of prosperity and lived through ten years of drought, dust, disease and death.
The American effort to relieve starvation in Soviet Russia in 1921 during the worst natural disaster in Europe in 500 years.