Whatever the out come of Iran's presidential election, negotiations will not soon--if ever--put an end to its nuclear threat. And given Iran's determination to achieve deliverable nuclear weapons, speculation about a possible Israeli attack on its nuclear program will not only persist but grow. So what would such an attack look like? Obviously, Israel would need to consider many factors--such as its timing and scope, Iran's increasing air defenses, the dispersion and hardening of its nuclear facilities, the potential international political costs, and Iran's "unpredictability." While not as menacingly irrational as North Korea, Iran's politico-military logic hardly compares to our NATO allies. Central to any Israeli decision is Iran's possible response.