The first around-the-world air race was sponsored to prove that the airplane had a commercial future. Four pilots took off from Seattle and two returned 175 days later.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
Engineered by William Barclay Parsons, the 21-mile, four-track route of the New York City Subway was the largest public works project in history.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
The effort of pioneering researchers to conceive babies through in vitro fertilization.
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 remarkable story of how a railroad was built connecting California to the East.