For three decades Vice President Dick Cheney conducted a secretive, behind-closed-doors campaign to give the president virtually unlimited wartime power. Finally, in the aftermath of 9/11, the Justice Department and the White House made a number of controversial legal decisions. Orchestrated by Cheney and his lawyer David Addington, the department interpreted executive power in an expansive and extraordinary way, granting President George W. Bush the power to detain, interrogate, torture, wiretap and spy -- without congressional approval or judicial review. The vice president believes that Congress has very few powers to actually constrain the president and the executive branch," former Justice Department attorney Marty Lederman tells Frontline. "He believes the president should have the final word -- indeed the only word -- on all matters within the executive branch." After Sept. 11, Cheney and Addington were determined to implement their vision -- in secret. The vice president and his counsel found an ally in John Yoo, a lawyer at the Justice Department's extraordinarily powerful Office of Legal Counsel. In concert with Addington, Yoo wrote memoranda authorizing the president to act with unparalleled authority. "There were extravagant and unnecessary claims of presidential power that were wildly overbroad to the tasks at hand," [former Assistant Attorney General Jack L. Goldsmith] says. As the White House and Congress continue to face off over executive privilege, the terrorist surveillance program, and the firing of U.S. attorneys, Frontline tells the story of what's formed the views of the man behind what some view as the most ambitious project to reshape the power of the president in American history.