The headline in the New York Times, based on a National Intelligence Estimate, says:
On the other hand, Greg Cochran, who made the correct call back in 2002 that Iraq had no active nuclear weapon program, thinks that might be over-confident, saying that the line between civilian and military uranium-enrichment is fuzzy. He figures that the grown-ups in Washington, such as the Joint Chiefs of Staff and Defense Secretary Robert Gates, don't want a war with Iran and just want to run out the clock on the 13.5 months left in the Bush Administration without anything too stupid happening. So they might be spinning this report to calm the war fever.
Back in 1994, when Bill Clinton wanted to invade Haiti as a sop to the Congressional Black Caucus, an operation the Joint Chiefs thought was pointless, the brass hats misled the militarily-ignorant President for several months about how tough the job would be. Perhaps something similar is happening here?