Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
The New Deal program CCC put three million young men to work in camps across America.
Equipment failure, human error and bad luck led to the country's worst nuclear accident in 1979.
Brothers Wilbur and Orville Wright built a flying machine that made its first flight in Kitty Hawk, North Carolina in 1903.
The grave truth behind modern forensics was discovered in 1920s New York.
A six-hour series on how the West was lost and won, from the Gold Rush in 1848 until Wounded Knee in 1893.
After 18 years of struggles, the Golden Gate Bridge opened on May 27, 1937.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.