Though first seen only as an expensive luxury, Alexander Graham Bell's telephone soon transformed American life and became a necessity.
Robert Moses fueled some of the most ambitious -- and controversial -- public works projects ever conceived.
John Wesley Powell's epic journey into the unknown Grand Canyon was filled with adventure as his team mapped the Colorado River for the first time.
John Philip Sousa was America's favorite bandmaster.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
An updated look at the Alabama tenant farmer families that Walker Evans and James Agee documented in their 1936 Pulitzer Prize-winning book.
The Alaskan Highway stands today as one of the boldest homeland security initiatives ever undertaken.
In 1960, Francis Gary Powers' U-2 spy plane was shot down over the Soviet Union.