The transcontinental railroad's construction touched the lives of hundreds of thousands of people. Some desired it, some built it, and some did everything in their power to stop it. Browse a photo gallery of settlers, Native Americans, and workers whose lives were affected by the railroad as it traversed the West.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
The internationally famous carnival of delights in New York was the birthplace of the hot dog and the roller coaster.
The Pennsylvania Railroad Company accomplished an enormous engineering feat, but destroyed a great architectural monument.
The dramatic story of the streamliners is one of remarkable achievements and opportunities lost.
Robert Moses fueled some of the most ambitious -- and controversial -- public works projects ever conceived.
The grave truth behind modern forensics was discovered in 1920s New York.
During the Great Depression, Americans built the Hoover Dam, one of the greatest engineering works in history.
The effort of pioneering researchers to conceive babies through in vitro fertilization.