Equipment failure, human error and bad luck led to the country's worst nuclear accident in 1979.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
After 18 years of struggles, the Golden Gate Bridge opened on May 27, 1937.
A personal story of one family's dramatic effort to hold onto their family farm in Iowa as massive foreclosures sweep the nation in the 1990s.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.
The Alaskan Highway stands today as one of the boldest homeland security initiatives ever undertaken.
Postwar New York City and the global economic order told through the story of the World Trade Center.
The Pennsylvania Railroad Company accomplished an enormous engineering feat, but destroyed a great architectural monument.