In 1965, The Dow Company — best known at that time for making Saran Wrap — began making Napalm, a jellied gas used in warfare in Vietnam.

In 1967, a demonstration at the University of Wisconsin was the first violent campus protest of the antiwar movement.

In October of 1967, a massive protest at the University of Wisconsin turned violent when police arrived on the scene.

In October 1967, a Viet Cong ambush nearly wiped out an American battalion, prompting some in power to question whether the war might be unwinnable.

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.

Native fishermen at Celilo Falls on the Columbia River.

Workers at the Baltimore Luggage Company making suitcases in 1957.

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

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

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.