A brief history of dangerous chemicals and compounds in our homes.

Former North Carolina Klansman C.P. Ellis recalls his initiation.

The film Birth of a Nation glorified the KKK and became an integral part of the group’s revival in the 1920s.

A family sips from a “spring of youth” ca. 1947.

Workers at the Baltimore Luggage Company making suitcases in 1957.

President Franklin Roosevelt walks down a ramp from his private railroad car ca. 1938.

Native fishermen at Celilo Falls on the Columbia River.

Japanese Americans are released from the Jerome War Relocation Center in Arkansas. This film was shot in Kodachrome in 1944, likely by an Army employee.

A mushroom cloud seen from Las Vegas in 1958.

The remarkable story of the journey taken by President Theodore Roosevelt and legendary Brazilian explorer Candido Rondon into the heart of the South American rainforest to chart an unexplored tributary of the Amazon in 1914.

Teenie bopper, speed, stoned, turn on. These were just a few of the words that were defined for tourists as they took a bus ride down Haight Street in San Francisco during 1967 — the Summer of Love.

In January 1967, the thousands of youth already in San Francisco descended on Golden Gate Park for a Human Be-In. The media flocked to the event, putting hippies in the national spotlight for the first time. And once the press offered a window into the world of Haight Ashbury, even more young people flooded in.

With schools out in the summer of 1967, thrill-seekers flooded into San Francisco. When they arrived in the Haight and Ashbury neighborhood, they found a world where free love and free clothing was the norm. Joel Selvin reflects in the film: “The Free Store, what fun that was. I mean, just the idea was liberating, a place where they gave you things where money was no longer the relevant issue.”

At age 23, Amelia Earhart took her first ride in an airplane and knew she had to fly.

By the mid-1960s, as North Beach became commercialized, baby boomers drawn to a Bohemian lifestyle began moving into a low-rent neighborhood across town, the Haight-Ashbury district. Many began experimenting with communal living in the large Victorian houses of the Haight, and visions of a utopian society began taking shape, enhanced by a mind-altering new drug called LSD, or acid.

Summer of Love is a striking picture of San Francisco's Haight Ashbury district during the summer of 1967 — from the utopian beginnings, when peace and love prevailed, to the chaos, unsanitary conditions, and widespread drug use that ultimately signaled the end.

Joseph Pilates was born in Germany in 1883. Living in England at the outbreak of WWI, Pilates was interned as an “enemy alien.” During his time in the internment camp, he developed a fitness regime for himself and his fellow prisoners. At the end of the war he returned to Germany, where his fitness method, which he called “Contrology,” became popular in the dance community.

Discover how the violent and bloody conflict transformed the nation forever, as America steps onto the world stage for the first time. But while many heralded the peace, others worried about democracy at home.

Composer Peter Rundquist begins his composition process with research of the film topic, and watching the film itself. In this Scene Breakdown, Rundquist explains his approach to scoring a scene from The Great War.

Follow America’s entry into the war as patriotism sweeps the nation, stifling free speech and dissent. A diverse group of men become the country’s first mass conscripted army, while women continue to demand the vote.