"The lads from Liverpool" led a musical cultural exchange that impacted everything from fashion to sexual mores to politics. Graham Nash, Smokey Robinson and more recall what it was like to make music that mirrored the souls of the young.

Tom Hayden, Gloria Steinem and others discuss one of the most dramatic years in U.S. history. A Soviet incursion, assassinations, the wars in Southeast Asia, violence at the Democratic National Convention and the election of President Nixon.