Watch Frontline Season 26 in Australia

For three decades, Vice President Dick Cheney has waged a secretive, and often bitter battle to expand the power of the presidency. Now in a direct confrontation with Congress, as the administration asserts executive privilege to head off investigations into domestic wiretapping and the firing of U.S. attorneys, FRONTLINE meticulously traces the behind-closed-doors battle within the administration over the power of the presidency and the rule of law.

Five years ago, FRONTLINE and The New York Times joined forces to investigate death and dismemberment in one of America's most dangerous industries -- the iron pipe foundry business. One company stood out, the McWane Corporation. It had more health and safety violations than all of its competitors combined, and there were a number of environmental violations as well. In the five years since our original broadcast, federal prosecutors obtained indictments against and juries convicted the company in five cases in four states. Today McWane says it has made a dramatic turnaround and that worker safety and environmental protection are now high priorities. FRONTLINE revisits its original broadcast with correspondent Lowell Bergman who then reports on what has changed at McWane and whether the company has become a less dangerous business.

This two-hour program examines the rich personal and political biographies of John McCain and Barack Obama and goes behind the headlines to discover how they arrived at this moment and what their very different candidacies say about America.

For years, big business -- from oil and coal companies to electric utilities to car manufacturers -- have resisted change to environmental policy and stifled the debate over climate change in America and around the globe. Now, facing rising pressure from governments, green groups and investors alike, big business is reshaping its approach to the environment. With the election looming, FRONTLINE producer Martin Smith investigates what some businesses are doing to fend off new regulations and how others are repositioning themselves to prosper in a radically changed world.

The next president of the United States will inherit some of the greatest foreign policy challenges in American history -- an overstretched military, frayed alliances, and wars on two fronts. FRONTLINE gives viewers a hard, inside look at the real policy choices the next president will face. The report features strategists and diplomats giving their best advice about how to correct past failures and how to shape a realistic foreign policy approach in Iraq, Afghanistan and Pakistan.

In the wake of yet another hard-fought and bitter presidential campaign, FRONTLINE presents a spirited and revealing biography of Lee Atwater, the charming, Machiavellian godfather of modern, take-no-prisoners Republican political campaigns. Through eye-opening interviews with Atwater's closest friends and adversaries, the film explores the life of the controversial political operative who mentored Karl Rove and George W. Bush, led the GOP to historic victories, and wrote the party's winning playbook. The story tracks Atwater's rise from his beginnings in South Carolina as a high school election kingmaker all the way to the White House and his subsequent battle with cancer and final search for forgiveness and redemption. To Democrats, Atwater was a political assassin who one Congresswoman dubbed "the most evil man in America," but to Republicans he remains a hero for his deep understanding of the American voter and his unapologetic vision of politics as warfare.

FRONTLINE looks at Venezuela's controversial and outspoken president Hugo Chavez and the revolution he claims is turning his country into an anti-capitalist beacon for Latin America and the world. Through the lens of his unique weekly program "Al Presidente" and the eyes of the Venezuelans who know him well, FRONTLINE digs below the surface of his presidency and his personality to try to understand the mercurial leader.