Meet Nikola Tesla, the genius engineer and tireless inventor whose technology revolutionized the electrical age of the 20th century. Although eclipsed in fame by Edison and Marconi, it was Tesla's vision that paved the way for today's wireless world. His fertile but undisciplined imagination was the source of his genius but also his downfall, as the image of Tesla as a mad scientist came to overshadow his reputation as a brilliant innovator.

The Battle of Chosin Reservoir, a crucial battle in the Korean War.

An account of an incident at a Titan II missile complex in Damascus, Ark., in 1980 that almost caused the explosion of a ballistic missile carrying a nuclear warhead 600 times more powerful than the bomb that destroyed Hiroshima. The near-calamity was kicked off when a socket fell from the wrench of an airman performing maintenance in a Titan II silo and punctured the missile, releasing a stream of highly explosive rocket fuel. Included: first-person accounts of USAF personnel on the scene.

A profile of scientist and writer Rachel L. Carson (1907-64), whose 1962 book "Silent Spring" helped launch the modern environmental movement.

Engineers overcome challenges to construct America's first subway system in Boston.

Oklahoma City explores the intertwined narratives of the worst domestic terrorist attack in the U.S. and the anti-government movement that inspired the actions of Timothy McVeigh, including two standoffs with law enforcement with tragic outcomes - Ruby Ridge and the Branch Davidian compound in Waco, Texas. On April 19, 1995, McVeigh, a former soldier deeply influenced by the literature and ideas of the radical right, set off a truck bomb that destroyed the Alfred P. Murrah Federal Building, killing 168 people and injuring 675 others. Oklahoma City traces the events that led McVeigh to that day and recounts the stories of the survivors, first-responders, U.S. Marshals, FBI investigators and journalists who covered the events. The film provides an in-depth and provocative exploration of the white supremacist, extremist militia movement that rose to prominence in the early 1990s and still makes news today.

Shortly before dawn on August 21, 1992, six heavily armed U.S. marshals made their way up to the isolated mountaintop home of Randy Weaver, his wife Vicki and their three children on Ruby Ridge in Northern Idaho. Charged with selling two illegal sawed-off shotguns to an undercover agent, Weaver had failed to appear in court and law enforcement was tasked with bringing him in. For months, the Weavers had been holed up on their property with a cache of firearms, including automatic weapons. When the federal agents doing surveillance on the property killed the barking dog of the family, a firefight broke out. The standoff that mesmerized the nation would leave Weaver injured, his wife and son dead, and some convinced that the federal government was out of control. Drawing upon eyewitness accounts, including interviews with Weaver's daughter, Sara Weaver, and federal agents involved in the confrontation, Ruby Ridge is a riveting account of the event that helped give rise to the modern American militia movement.

Explore America's tortured, nearly three-year journey to war. In August 1914, a war unprecedented in size and violence broke out on the European continent. Ever the idealistic diplomat, Wilson vowed to keep his country out of "the Great War." His neutrality was supported but reports from Europe began to challenge America's delicate position. From behind the battle lines came reports detailing German atrocities in Belgium and France: history's first chemical attack and the sinking of the British liner Lusitania, killing 128 Americans. But Wilson stood firm, asserting that America would not fight - this was not her war. Despite Wilson's pleas, American men and women, volunteered in the hospitals and on the fighting fields of France, and by 1916, there was a growing sense that the war was coming closer to home. On April 2, Wilson asked a joint session of Congress for a declaration of war against Germany, proclaiming that "the world must be made safe for democracy."

Americas entry into World War 1 is recalled, including the speed of mobilization.

Chart the ways in which the bloodiest battle in American history, and the ensuing peace, forever changed a president and a nation. In the fall of 1918, the deadly flu swept through cities at home and at the front. When the tide of war turned, the Germans wanted a cease-fire on Wilson's terms. On November 11, 1918, the war was over, but for Wilson, the last fight remained. He negotiated the terms of the peace treaty and won the world over to his League of Nations, but felled by a stroke, he failed to convince the Senate to ratify the Treaty of Versailles, with tragic consequences. While Wilson had heralded the triumph of American values abroad, many were worried about democracy at home; with citizens persecuted, "aliens" interned, and cities torn apart by race riots. The Great War changed the country forever. African Americans who had fought in the war found ways to continue to push for change. Women's suffrage gained converts, including Wilson. And America stepped onto the world stage.