When November 2007 National Intelligence Estimate came out, it completely overturned the standing logic on Iran's nuclear program by suggesting that the Iranians had actually stopped work on a nuclear device in 2003. At the time, most of the media were too distracted with this revelation to dig into the politics behind NIE's curious release.

Two years later Thomas Fingar, who was the Chairman of the National Intelligence Council at the time, is talking about who ordered the NIE's findings leaked and why:

"This example is drawn from the highly contentious 2007 National Intelligence Estimate on Iran’s Nuclear Intentions and Capabilities. It became contentious, in part, because the White House instructed the Intelligence Community to release an unclassified version of the report’s key judgments but declined to take responsibility for ordering its release."

See the full speech here and Joshua Pollack's analysis here.