kos explains it all
The Daily Kos has a tasty rant about the news that the Pentagon leadership wants a new agency to
manufacture discover intelligence information linking Iraq to al Qaeda.
So you're a Bush Administration official looking for a reason -- any reason -- to invade Iraq (say, Donald Rumsfeld). You ask your intelligence agencies (CIA, DIA, NSA, etc.) for confirmation that Iraq has ties to Al Qaeda. The agencies mine their assets, review their data, train satellites and listening devices and whatever other exotic technologies they may have on the Iraqis and scattered Al Qaeda members.
And after analyzing everything, they conclude there are no ties between Al Qaeda and Saddam Hussein.
So what do you do?
Well, given that this admininstration is the most intensely political in the history of our fair nation, you simply follow from the Rove game plan -- you create a new "intelligence agency" and fill it with political appointees who will confirm whatever lies the administration spews.
...So to clarify, the CIA (and other intelligence agencies) gather the information. They then interpret it. But if the administration doesn't like that interpretation (e.g. Hussein and OBL hate each other and would never work together), the new agency can take a look at the info and arrive at a more "acceptable" conclusion (or in Rumsfeld's words, "assist policymakers in assessing the intelligence they receive").