The ongoing protests in the United States lead to the end of the war and Richard Nixon securing the presidency.

The mounting pressure of the presidential race following the death of Sen. Robert F. Kennedy.

The assassination of Martin Luther King Jr. and Sen. Robert F. Kennedy's pursuit of the Democratic nomination.

The turning point in the Vietnam War as well the beginning of the 1968 presidential election that changed the course of history.

A chronicle of the most consequential events of 1989, which saw the rise of radicalism, the intensification of tabloid news culture, the birth of the internet, and diverse voices gaining unprecedented traction.

Directed by François Pomès, this two-part documentary chronicles the epic adventure of the Apollo space program, which included both tragic setbacks and historic successes. The first phase takes place against a backdrop of the Cold War, from the disaster of the Apollo 1 mission to the triumph of the Apollo 8 mission. The last stage culminates with the Apollo 11 space flight which landed American astronauts Neil Armstrong and Buzz Aldrin on the Moon. With full-color archival images and 3D reenactments of the mission's key stages, this immersive account details the journey of the men and women who contributed to the celebrated Apollo 11 mission.

Richard Milhous Nixon, the 37th president of the U.S. and first to resign, led a political career as varied, dynamic and disruptive as any in history. His rise, fall, comeback and eventual destruction during some of America's most tumultuous decades are examined in "Tricky Dick." The four-part series relies solely on archival footage, some seen for the first time here, to tell a story of power, politics and scandal. It begins with his early political life in California, moves to his calculated crusade for the presidency that leads into the tumult of the Vietnam War era, and concludes with Nixon's re-election and ensnarement in Watergate.

Anthropologist Alice Roberts and archaeologist Neil Oliver investigate Celtic civilization.

Over six episodes, "American Dynasties: The Kennedys" takes viewers inside America's "First Family," revealing how personal relationships within the Kennedy dynasty helped shape national and global events, from the Cuban Missile Crisis to civil rights legislation. The docuseries spans the lives of Joseph and Rose Kennedy and their children, beginning with how Joe passes his political ambition first to son Joe Jr. and then to reluctant second son, John F. Kennedy, and eventually uncovers how and why this one family so significantly impacted 20th-century America.

Conspiracy theories, myths and lies behind the most iconic symbols of America.

Natural and human forces combine to create some of history's largest and most improbable disasters.