The Islamic Republic of Iran is determined to become the world's tenth nuclear power. It is defying its international obligations and resisting concerted diplomatic pressure to stop it from enriching uranium. It has flouted several UN Security Council resolutions directing it to suspend enrichment and has refused to fully explain its nuclear activities to the International Atomic Energy Agency. Even a successful military strike against Iran's nuclear facilities would delay Iran's program by only a few years, and it would almost certainly harden Tehran's determination to go nuclear. The ongoing political unrest in Iran could topple the regime, leading to fundamental changes in Tehran's foreign policy and ending its pursuit of nuclear weapons. But that is an outcome that cannot be assumed. If Iran's nuclear program continues to progress at its current rate, Tehran could have the nuclear material needed to build a bomb before U.S. President Barack Obama's current term in office expires.
The dangers of Iran's entry into the nuclear club are well known: emboldened by this development, Tehran might multiply its attempts at subverting its neighbors and encouraging terrorism against the United States and Israel; the risk of both conventional and nuclear war in the Middle East would escalate; more states in the region might also want to become nuclear powers; the geopolitical balance in the Middle East would be reordered; and broader efforts to stop the spread of nuclear weapons would be undermined. The advent of a nuclear Iran -- even one that is satisfied with having only the materials and infrastructure necessary to assemble a bomb on short notice rather than a nuclear arsenal -- would be seen as a major diplomatic defeat for the United States. Friends and foes would openly question the U.S. government's power and resolve to shape events in the Middle East. Friends would respond by distancing themselves from Washington; foes would challenge U.S. policies more aggressively.
Such a scenario can be avoided, however. Even if Washington fails to
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