EL AVIV -- It's official. Iran has delivered its response to Washington's open-minded, well-intentioned efforts to find a diplomatic solution to the nuclear crisis. Tehran's five-page letter amounts to a joke, a mockery of the West, a nose-thumbing at Barack Obama, the United States and the international community. This means that in the months to come, Obama will likely face the most difficult and dangerous decision of his presidency. Obama's famous outstretched hand, his legendary oratorical skills, his faith in humanity proved insufficient to persuade the now-embattled and even more radicalized rulers of the Islamic Republic to get serious about...