The first around-the-world air race was sponsored to prove that the airplane had a commercial future.
In 1960, Francis Gary Powers' U-2 spy plane was shot down over the Soviet Union.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.
A marvel of engineering, architecture, and vision, the story of the Beaux Arts structure on 42nd street that forever changed midtown Manhattan.
The grave truth behind modern forensics was discovered in 1920s New York.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
Robert Moses fueled some of the most ambitious -- and controversial -- public works projects ever conceived.