Astronaut and NASA Administrator Charles Bolden, astronauts Mike Massimino & Dave Scott, Tom Hanks and others describe the greatest adventure story of all time. The "giant leap" pushed the boundaries of exploration to an unprecedented frontier.

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.

Gloria Steinem, Robert Kennedy, Jr., Marlo Thomas, and others discuss how feminism, civil rights, environmentalism, conservatism, and the gay rights movements were fueled by deep yearnings for freedom by a generation unwilling to wait.