The rage in Tehran’s streets suggests that time may be running out for a brutal regime, but that same clock is ticking for Barack Obama and what to do about the Iranian bomb. A reprise of the Cairo speech won’t work; the Muslims are masters of endless, empty rhetoric themselves, and know how to figure the discount on words. The consequences of taking out the Iranian nuclear works, or enabling Israel to do it for him, would be awful, exceeded only by the consequences of allowing the mullahs in Tehran to get their bomb. Then everybody in Arabia would want one. The Saudis would buy one from Pakistan; certain intelligence sources say a deal is already in the works to deliver it once an Iranian bomb is in place. If the Shi’ites have a bomb, it’s only logical, as logic is measured in that miserable corner of the world, for the Sunnis to get one. Every thuggish eighth-century theocracy must be fully armed.