(MUSIC: "Volunteers"/Jefferson Airplane)

Woodstock became a symbol of the young peoples' rebellion against traditional values. Many young people called themselves hippies. Hippies believed there should be more love and personal freedom in America.

In nineteen sixty-seven, poet Allen Ginsberg helped lead a gathering of hippies in San Francisco. No one knows exactly how many people considered themselves hippies. But twenty thousand attended the gathering.

Another leader of the event was Timothy Leary.

TIMOTHY LEARY: “Now, energy comes … ”

He was a former university professor and researcher. Leary urged the crowd in San Francisco to "tune in and drop out." This meant they should use drugs and leave school or their job. One drug that was used in the nineteen sixties was lysergic acid diethylamide, or LSD. LSD causes the brain to see strange, colorful images. It also can cause brain damage.

(MUSIC: "Lucy in the Sky with Diamonds")

Some people say the Beatles' song "Lucy in the Sky with Diamonds" was about LSD.

(MUSIC: “The Andy Griffith Show”/Andy Griffith)

As many Americans were listening to songs about drugs and sex, many others were watching television programs with traditional family values. These included "The Andy Griffith Show" and "The Beverly Hillbillies." At the movies, some films captured the rebellious spirit of the times.

These included “The Graduate” and "Doctor Strangelove.”