After notorious revolutionary leader Pancho Villa's raid on Columbus, New Mexico, General John Pershing and his 150,000 man cavalry set out to get Villa, dead or alive.
After the stock market crashed in 1929, thousands suffered unemployment and poverty in the Great Depression.
The Alaskan Highway stands today as one of the boldest homeland security initiatives ever undertaken.
In the early 1830s, Texas, ruled by Mexico, held 20,000 U.S. settlers and 4,000 Mexican Tejanos, forcing residents to pick sides.
The international race to develop biological weapons during the 20th century.
The U.S. and the Soviet Union race to build the hydrogen bomb during the Cold War, thus beginning the nuclear arms race.
A look at five real-life "Rosies," the reality of working in defense plants during World War II and then having to give up those jobs for returning GIs.
In the summer of 1940, 10,000 children were sent from wartime Britain to the United States.
The bizarre saga of the Symbionese Liberation Army and Patty Hearst's kidnapping and conversion to her captors' cause.