xxx xxxxxx xxxxxxxxx xxxxxxxxxx xxxxxxxxxx xxxxxxxx xxxxxxxx xxxx xxxxxxx xxxxxxxxx xxxxxxxxx xxxxx xxxxxxxxxx xxxxxxxxxx xxxxxxxxxxx xxxx xxxxxxxxxx xxxxxxxxxxx xxxxxxxxx xxxxxxxxxxxx xxxx xxx xxxxxx xxxxxxx xxxxxx xxxxxxxxxx xxxxxxxxxxxxx xxxx xxxxxxxx xxxx xxxxxxxx xxxx xx xxxxx xxxxx xxxxx xxxxxxxx xxxx xxxxx xxxx xxxxx xxx xxxxxxx xxxxxxx xxxx xxxxx xxxxx xxxxxx xx xxxxx xxx xx xxxxxxx This demonstrated to Afghan warlords that they could not play America and Iran off one another and prompted Tehran to deport hundreds of suspected Al Qaeda and Taliban operatives who had fled Afghanistan.

Those who argue that Iran did not cause Iraq’s problems and therefore can be of only limited help in dealing with Iraq’s current instability must also acknowledge that Iran did not “cause” Afghanistan’s deterioration into a terrorist-harboring failed state. But, when America and Iran worked together, Afghanistan was much more stable than it is today, Al Qaeda was on the run, the Islamic Republic’s Hezbollah protégé was comparatively restrained, and Tehran was not spinning centrifuges. Still, the Bush administration conveyed no interest in building on these positive trends.

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From an Iranian perspective, this record shows that Washington will take what it can get from talking to Iran on specific issues but is not prepared for real rapprochement. Yet American proponents of limited engagement anticipate that Tehran will play this fruitless game once more — even after numerous statements by senior administration figures targeting the Islamic Republic for prospective “regime change” and by President Bush himself that attacking Iran’s nuclear and national security infrastructure is “on the table.”

Our experience dealing with xxxx xxxx Iranian diplomats over Afghanistan and in more recent private conversations in Europe and elsewhere convince us that Iran will not go down such a dead-end road again. Iran will not help the United States in Iraq because it wants to avoid chaos there; Tehran is well positioned to defend its interests in Iraq unilaterally as America flounders. Similarly, Iran will not accept strategically meaningful limits on its nuclear capabilities for a package of economic and technological goodies.

Iran will only cooperate with the United States, whether in Iraq or on the nuclear issue, as part of a broader rapprochement addressing its core security concerns. This requires extension of a United States security guarantee — effectively, an American commitment not to use force to change the borders or form of government of the Islamic Republic — bolstered by the prospect of lifting United States unilateral sanctions and normalizing bilateral relations. This is something no United States administration has ever offered, and that the Bush administration has explicitly refused to consider.

Indeed, no administration would be able to provide a security guarantee unless United States concerns about Iran’s nuclear activities, regional role and support for terrorist organizations were definitively addressed. That is why, at this juncture, resolving any of the significant bilateral differences between the United States and Iran inevitably requires resolving all of them. Implementing the reciprocal commitments entailed in a “grand bargain” would almost certainly play out over time and in phases, but all of the commitments would be agreed up front as a package, so that both sides would know what they were getting.

Unfortunately, the window for pursuing a comprehensive settlement with Iran will not be open indefinitely. The Iranian leadership is more radicalized today, with Mahmoud Ahmadinejad as president, than it was three years ago, and could become more radicalized in the future, depending on who ultimately succeeds Ayatollah Ali Khamenei as supreme leader. If President Bush does not move decisively toward strategic engagement with Tehran during his remaining two years in office, his successor will not have the same opportunities that he will have so blithely squandered.