The global cyberwar is heating up and the stakes are no longer limited to the virtual world of computers. Now, thanks in part to secret documents released by Edward Snowden, the true scale of the National Security Agency's scope and power is coming to light. Besides spending billions of dollars to ingest and analyze the worlds' electronic communications, the NSA has set out to dominate a new battlefield—cyberspace. We examine the science and technology behind cyber warfare and asks if we are already in the midst of a deadly new arms race". Already, highly sophisticated, stealthy computer programs such as the notorious Stuxnet worm can take over and even destroy the control systems that regulate everything from food factories to gas pipelines, power plants, and chemical facilities—even our cars. While the destruction of Iranian centrifuges may have delayed Iran’s bomb program and forestalled an Israeli attack, the attack has opened a Pandora's Box, and now America's own critical infrastructure is vulnerable to retaliation and attack. With leading defense experts and investigative journalists who have probed the murky realm of criminal and strategic hacking, NOVA examines the chilling new reality of cyberwar in which no nation or individual is safe from attack.

Nearly half a million years ago, the most advanced human yet roams Europe. Strong and powerful, Homo heidelbergensis are fierce hunters, use sophisticated tools and live in close-knit family groups. Over 200,000 years they become split into two populations by extremes of weather and environment and evolve separately into two very different species. In the North are the Neanderthals, whose physical power and resilience is the key to surviving in ice age Northern Europe. About 140,000 years ago, Africa is in the grip of a devastating drought, and something remarkable has happened to the descendants of heidelbergensis who live there. The combination of environment and chance has bred in them a unique ability that will change the course of human history. It will be this small band of southern survivors, perhaps numbering just a few tens of thousands, who will come to dominate the world and be known as Homo sapiens.

Many consider it the greatest team ever assembled, in any sport. Yet even that description fails to give it proper credit for its impact. The original the Dream Team, the first U.S. Olympic team to include NBA stars was a phenomenon on and off the court. It mattered not that it dominated the Olympic competition. It won the gold medal at the 1992 Olympics in Barcelona, beating its eight opponents by an average of 44 points. What was important was that the Dream Team, gave fans a glimpse of basketball at its finest, and an entire world responded. The film is the definitive documentary of the historic 1992 USA Basketball team, featuring recent interviews with all 12 members, including Michael Jordan, Magic Johnson, Larry Bird, and Charles Barkley. Includes rare footage from USA Basketball's film library, and the untold story behind what has become part of basketball legend. Since 1992, basketball has exploded in popularity around the globe, rising to a place where it truly challenges soccer's status as the world's most popular sport. Much of that is due to the impact of the Dream Team, which attracted fans and followers wherever it went. "It was," said Coach Chuck Daly, "like Elvis and the Beatles put together. Traveling with the Dream Team was like traveling with 12 rock stars. That's all I can compare it to." And what a band it was. Start with three of the game's all-time greats: Michael Jordan, Magic Johnson and Larry Bird. Add the irrepressible Charles Barkley for a little spice, as well as seven more NBA All-Stars: centers David Robinson and Patrick Ewing, power forward Karl Malone, swingmen Scottie Pippen, Chris Mullin and Clyde Drexler and point guard John Stockton. Complete the roster with Christian Laettner, the best college player of 1991-92 and a future NBA All-Star. Opponents didn't have a chance, but they didn't care.

The documentary series reveals the extraordinary riches and wonders of the Polar Regions that have kept people visiting them for thousands of years. Today, their survival relies on a combination of ancient wisdom and cutting-edge science. Most Arctic people live in Siberia, either in cities like Norilsk - the coldest city on earth - or out on the tundra, where tribes like the Dogan survive by herding reindeer, using them to drag their homes behind them. On the coast, traditional people still hunt walrus from open boats - it is dangerous work, but one big walrus will feed a family for weeks. Settlers are drawn to the Arctic by its abundant minerals; the Danish Armed Forces maintain their claim to Greenland's mineral wealth with an epic dog sled patrol, covering 2,000 miles through the winter. Above, the spectacular northern lights can disrupt power supplies so scientists monitor it constantly, firing rockets into it to release a cloud of glowing smoke 100 kilometres high. In contrast, Antarctica is so remote and cold that it was only a century ago that the first people explored the continent. Captain Scott's hut still stands as a memorial to these men. Science is now the only significant human activity allowed; robot submarines are sent deep beneath the ice in search of new life-forms, which may also be found in a labyrinth of ice caves high up on an active volcano. Above, colossal balloons are launched into the purest air on earth to detect cosmic rays. At the South Pole there is a research base designed to withstand the world's most extreme winters. Cut off from the outside world for six months, the base is totally self-sufficient, even boasting a greenhouse.

World War II is a watershed event for Latino Americans with hundreds of thousands of men and women serving in the armed forces, most fighting side by side with Anglos. In the Pacific, East L.A.'s Guy Gabaldon becomes a Marine Corp legend when he singlehandedly captures more enemy soldiers than anyone in US military history. But on the home front, discrimination is not dead: in 1943, Anglo servicemen battle hip young "Zoot suitors" in racially charged riots in southern California

George W. Bush's doctrine of endless war in Iraq and Afghanistan and the continued cannibalization of the U.S. economy. Squandered chances given by the end of the Cold War. A new USA, the National Security Fortress.