(10. April) In August 2009, just five months after the committee had authorized its study, the Justice Department broadened its look at the CIA program from a review of the destruction of the videotapes to an investigation into CIA interrogations.

This meant that CIA officers whom the committee might have interviewed now faced legal jeopardy, which led then-CIA Director Leon Panetta to decide not to compel agency personnel to participate in our interviews.

And it was this Justice Department review, not partisanship, that led Republicans on the intelligence committee to withdraw from the study.