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.
During World War II, more than a thousand women signed up to fly with the U.S. military as WASPS.
George Eastman introduced the Kodak and Brownie camera systems and transformed photography into something anybody could do.
The Pennsylvania Railroad Company accomplished an enormous engineering feat, but destroyed a great architectural monument.
When two passenger ships collide off Nantucket in 1909, 1,500 people rely on 26-year-old Jack Binns to operate a new technology - wireless telegraphy - to save them all.
The U.S. and the Soviet Union race to build the hydrogen bomb during the Cold War, thus beginning the nuclear arms race.
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.
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.