Number: RL33733 Title: Intelligence Estimates: How Useful to Congress? Authors: Richard A. Best, Jr., Foreign Affairs, Defense, and Trade Division Abstract: National Intelligence Estimates (NIEs) are often of considerable interest to many Members of Congress. They represent the most formal assessment of a given issue by the U.S. Intelligence Community and address issues of major national security importance which may require congressional action. The intelligence process, however, is not an exact science and, on occasion, NIEs have proved unreliable because they were based on insufficient evidence or contained faulty analysis. This was demonstrated in the NIE produced in 2002 on Iraqi Weapons of Mass Destruction, parts of which were significantly inaccurate. NIEs can provide insights into the likely effects of certain policy approaches, but they are not usually made to take into account the details of planned U.S. diplomatic, economic, military, or legislative initiatives. Pages: 15 Date: January 28, 2008