A CIA officer's name was blown, and there was a leak, and we needed to figure out how that happened, who did it, why, whether a crime was committed, whether we could prove it, whether we should prove it. Given national security was at stake, it was especially important that we find out accurate facts.
CIA probe 'not over' after Cheney's top aide indicted on CNN.com (October 28, 2005)
Cheney's top aide indicted; CIA leak probe continues - CNN (Oct 28, 2005)