The latter half of the 19th century saw the "golden age" of the American cowboy; newly-built railroad lines made it easier to transport cattle from the western plains to the east coast, where they could fetch top dollar. As these photos reveal, a cowboy's life was a hard one, but living freely on America's western frontier nevertheless appealed to thousands of men.
These photos were taken across the American West between the late 1800s and the early 1900s.
The remarkable and tragic life of the third Kennedy son, Robert F. Kennedy.
William "Buffalo Bill" Cody's legendary exploits helped create the myth of the American West that still endures today.
The first man to fly across the Atlantic, Charles Lindbergh was unprepared for the attention, particularly after his son was kidnapped.
Robert Noyce's invention of the microchip launched the world into the Information Age.
Originally settled as a mail stop, Las Vegas changed from an Old West vacation town, to a mafia haven, to the "Atomic City" and "Sin City."
The personal journey of three generations of a Japanese American family, including their stint in internment camps during World War II.
A man who symbolized African American equality fought a proponent of Hitler's Aryan racial theories on the eve of World War II.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.