Take a ride through the Panama Canal in this time-lapse video from 2010.
In 1967, thousands of hippies flocked to San Francisco's Haight Ashbury district.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
The historic journey of Apollo 8 captivated the world in 1968 -- a bright spot in a year marked by political assassinations, race riots, and the Vietnam War.
The remarkable story of mid-19th century ingenuity and perseverance during the laying of the transatlantic telegraph cable between North America and Europe.
The story of the American civil rights movement is told through its powerful music -- the freedom songs that protesters sang on picket lines, in mass meetings, in police wagons, and in jail cells as they fought for justice and equality.
The story of the polio crusade pays tribute to a time when Americans banded together to conquer a terrible disease.
A star in baseball's golden age, Joe DiMaggio's celebrity status and tumultuous marriage to Marilyn Monroe brought him pain.
While the U.N. debated strategies for control of atomic energy, the U.S. Navy was preparing for nuclear tests on Bikini Island.