NEW YORK (Reuters) - A U.S. conflict with Iran could be even more damaging to America's interests than the war with Iraq, former White House counterterrorism chief Richard Clarke wrote in Sunday's New York Times. In an op-ed article co-authored with Steven Simon, a former State Department official who also worked for the National Security Council, Clarke wrote reports that the Bush administration is contemplating bombing nuclear sites in Iran raised concerns that "would simply begin a multi-move, escalatory process." Iran's likely response would be to "use its terrorist network to strike American targets around the world, including inside the...