In Politico Magazine today, Michael Crowley writes about what he refers to as America’s “Plan B” for dealing with the Iranian nuclear program. Plan A is, of course, the diplomatic engagement that has led the U.S. to the brink of signing an agreement with Iran that is supposed to forestall the nuclear threat. That effort is part of a broader strategy change adopted by the Obama administration for the Middle East that seems predicated on the creation of a new entente with the Islamist regime. But, as Crowley writes, if the talks fall through and the U.S. walks away in the face of the latest bout of Iranian intransigence the U.S. Air Force has an answer to the world’s fears about Tehran’s nuclear capability: the Massive Ordinance Penetrator (MOP), a 15-ton bomb with 6,000 pounds of high explosives that can reportedly penetrate through 200 feet of earth and 60 feet of concrete and then blow up whatever is underneath those layers. That means the fortified mountainside bunker at Fordow may not be impregnable. That should leave the U.S. with a formidable Iran military option that, at least in theory, ought to persuade the Islamist regime to accede to U.S. demands for a tough and verifiable nuclear agreement. But the problem with Crowley’s interesting piece is that we already know this administration has no “Plan B” with respect to Iran. The president has already signaled that there will be no use of force and no walking away from even a bad nuclear deal.