“A lot of what needs to be done here will have to be done quietly, without any discussion, using sources and methods that are available to our intelligence agencies,” Cheney told Americans just after 9/11. He warned the public that the government would have to operate on the “dark side.”

In “The Dark Side,” FRONTLINE tells the story of the vice president’s role as the chief architect of the war on terror, and his battle with Director of Central Intelligence George Tenet for control of the “dark side.” Drawing on more than 40 interviews and thousands of documents, the film provides a step-by-step examination of what happened inside the councils of war.
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Tenet chose to stay, but after the failure to find Iraqi WMD, the tension between the agency and Cheney’s allies grew to the point that some in the administration believed the CIA had launched a covert war to undermine the president. In response, Cheney’s office waged a campaign to distance itself from the prewar intelligence the vice president had helped to cultivate. Under pressure, Tenet resigned. Cheney’s chief of staff, Scooter Libby, would later admit to leaking key sections of the NIE — authorized, he says, by Cheney. Libby also stated that the vice president told him that President Bush had declassified the material. Insiders tell FRONTLINE that the leak was part of the battle between the vice president and the CIA — a battle that many believe has destroyed the CIA.

This entire episode of Frontline is available for viewing online.