In the early 1830s, Texas, ruled by Mexico, held 20,000 U.S. settlers and 4,000 Mexican Tejanos, forcing residents to pick sides.
After the Soviet blockade of West Berlin, British and American pilots delivered tons of food and fuel to the German city by airplane for nearly a year.
In 1960, Francis Gary Powers' U-2 spy plane was shot down over the Soviet Union.
The staggering death tolls of the Civil War permanently altered the character of the republic and the psyche of the American people.
While the U.N. debated strategies for control of atomic energy, the U.S. Navy was preparing for nuclear tests on Bikini Island.
During World War II, more than a thousand women signed up to fly with the U.S. military as WASPS.
A minute-by-minute account, on both sides of the Pacific, leading up to the surprise attack on the U.S. fleet at Pearl Harbor.