LAST STAND.(change in U.S. foreign policy re. Iran and uranium enrichment )

On May 31st, Secretary of State Condoleezza Rice announced what appeared to be a major change in U.S. foreign policy. The Bush Administration, she said, would be willing to join Russia, China, and its European allies in direct talks with Iran about its nuclear program. There was a condition, however: the negotiations would not begin until, as the President put it in a June 19th speech at the U.S. Merchant Marine Academy, "the Iranian regime fully and verifiably suspends its uranium enrichment and reprocessing activities." Iran, which has insisted on its right to enrich uranium, was being asked to concede the main point of the negotiations before they started. The question was whether the Administration expected the Iranians to agree, or was laying the diplomatic groundwork for future military action. In his speech, Bush also talked about "freedom for the Iranian people," and he added, "Iran's leaders have a clear choice." There was an unspoken threat: the U.S. Strategic Command, supported by the Air Force, has been drawing up plans, at the President's direction, for a major bombing campaign in Iran.

Inside the Pentagon, senior commanders have increasingly challenged the President's plans, according to active-duty and retired officers and officials. The generals and admirals have told the Administration that the bombing campaign will probably not succeed in destroying Iran's nuclear program. They have also warned that an attack could lead to serious economic, political, and military consequences for the United States.

A crucial issue in the military's dissent, the officers said, is the fact that American and European intelligence agencies have not found specific evidence of clandestine activities or hidden facilities; the war planners are not sure what to hit. "The target array in Iran is huge, but it's amorphous," a high-ranking general told me. "The question we face is, When does innocent infrastructure evolve into something nefarious?" The high-ranking general added that the military's experience in Iraq, where intelligence on weapons of mass destruction was deeply flawed, has affected its approach to Iran. "We built this big monster with Iraq, and there was nothing there. This is son of Iraq," he said.

"There is a war about the war going on inside the building," a Pentagon consultant said. "If we go, we have to find something."

In President Bush's June speech, he accused Iran of pursuing a secret weapons program along with its civilian nuclear-research program (which it is allowed, with limits, under the Nuclear Non-Proliferation Treaty). The senior officers in the Pentagon do not dispute the President's contention that Iran intends to eventually build a bomb, but they are frustrated by the intelligence gaps. A former senior intelligence official told me that people in the Pentagon were asking, "What's the evidence? We've got a million tentacles out there, overt and covert, and these guys"--the Iranians--"have been working on this for eighteen years, and we have nothing? We're coming up with jack shit."

A senior military official told me, "Even if we knew where the Iranian enriched uranium was--and we don't--we don't know where world opinion would stand. The issue is whether it's a clear and present danger. If you're a military planner, you try to weigh options. What is the capability of the Iranian response, and the likelihood of a punitive response--like cutting off oil shipments? What would that cost us?" Secretary of Defense Donald Rumsfeld and his senior aides "really think they can do this on the cheap, and they underestimate the capability of the adversary," he said.

In 1986, Congress authorized the chairman of the Joint Chiefs of Staff to act as the "principal military adviser" to the President. In this case, I was told, the current chairman, Marine General Peter Pace, has gone further in his advice to the White House by addressing the consequences of an attack on Iran. "Here's the military telling the President what he can't do politically"--raising concerns about rising oil prices, for example--the former senior intelligence official said. "The J.C.S. chairman going to the President with an economic argument--what's going on here?" (General Pace and the White House declined to comment. The Defense Department responded to a detailed request for comment by saying that the Administration was "working diligently" on a diplomatic solution and that it could not comment on classified matters.)