Administration and military officials have announced that the US is deploying additional missile defense systems in the Middle East/Persian Gulf. The deployments include Patriot missile batteries in Qatar, United Arab Emirates, Kuwait and Bahrain (similar batteries have long been stationed in Israel and Saudi Arabia), as well as Aegis cruisers armed with missile interceptors that are positioned in the Persian Gulf. The moves are intended to counter the threat posed by Iran’s short -range and medium-range missiles; Western leaders fear that the Islamic Republic is developing nuclear warheads (Iranian leaders deny that they seek to acquire the Bomb) that could be launched by the aforementioned delivery vehicles against other countries in the region or America’s military forces.
The US wants to prevent Iran, which is viewed as a hostile nation, from joining the nuclear club. The administration has tried to resolve the crisis through diplomacy and threats of economic sanctions if the Iranian regime does not agree to take steps that would make it difficult for its scientists to enrich uranium to weapons-grade levels. In December of last year, Tehran accepted a deal to ship its unprocessed uranium abroad but backed out before it was finalized.
According to administration officials, the US is deploying the missile defense systems for the following reasons:
1. To reassure its Arab allies and dissuade them from building their own nuclear arsenals for deterrence purposes.
2. To deter Iran from developing the Bomb or using it against American interests in the region.
3. To persuade Israel not to launch a preemptive military strike against Iranian nuclear sites.
It is doubtful if the deployments will have much of an effect on the situation. They might provide a modicum of psychological comfort to Arab leaders, but American security guarantees (i.e., promises to come to the defense of its friends and allies in the event of an Iranian attack) would better achieve that purpose. The US has already suggested that it would retaliate against Iran if the Islamic Republic launched a nuclear strike, and that threat should be sufficient unless Arab governments do not consider it to be credible.
When it comes to deterring Iran from creating an atomic arsenal, missile defense systems will not likely change the decision calculus of Iranian leaders, who understandably fear that America will invade their nation and almost certainly want nuclear weapons to protect themselves from perceived external threats; such weapons would be a good deterrent because no country would want to invade a nuclear Iran and risk suffering an atomic counterattack even if the invading forces, or its allies, possessed missile defense systems that could lower the chances that a nuclear-armed missile would get through. As far as dissuading Iran from launching a first strike, the threat of nuclear retaliation alone would be enough to deter the Islamic Republic, so Patriot missiles are superfluous in this regard.
Israel already had Patriot missiles before the US put more in the region, and putting interceptors in Arab countries and the Persian Gulf would not substantially change Israel’s security status because Israel is not very close to the Gulf and Patriots are terminal-phase defense systems (meaning they are designed to destroy incoming warheads shortly before they detonate in the target area), so basing them in Arab states would not protect Israel. Israel has its own nuclear arsenal, but if the Jewish state still feels like that is not enough to deter Iran from hitting Tel Aviv with atomic weapons the mere presence of more Patriot missiles and Aegis cruisers will not stop Israeli leaders from bombing Iran’s nuclear facilities.
Nuclear weapons would not be the greatest threat to American interests emanating from the Islamic Republic if Iran becomes a nuclear power. The country’s ability to use terrorist groups (such as Hamas and Hezbollah) as proxies, foment instability in Iraq and Afghanistan, and close down the Straits of Hormuz, through which a large percentage of the world’s oil supply transits, are much more plausible methods that Iran could employ against the US and its partners in the region.
However, theater missile defense systems are not without purpose. They could be useful in knocking down Iranian missiles armed with conventional warheads in the event of a conflict. Although the odds that Iranian leaders would launch a nuclear first strike are extremely low (unless their country were invaded), there is a significant probability that they would use regular missiles to attack American military bases, large ground formations or the cities of US allies if a war involving the Islamic Republic broke out in the Middle East.