From diplomacy to sanctions, the administration is not making good-faith efforts to avert a war so much as going through the motions, eliminating other possible strategies of engagement, until the only option left on the table is the military one.

If this uncertainty does not appear to worry the proponents of air strikes in Iran it is in no small part because the real U.S. policy objective is not merely to eliminate the nuclear program, but to overthrow the regime. It is hard to believe, after the misguided talk prior to Iraq of how American troops would be greeted by flowers and welcomed as liberators, but those inside and close to the administration who are arguing for an air strike against Iran actually sound as if they believe the regime in Tehran can be eliminated by air attacks. ...

It sounds simple. Air planners always tell a good story. By the same token, they almost always fall short of their promises, even in strictly military terms. That was true in World War II. It was true in Korea. It was true in Vietnam. It has just proved true with the Israeli attacks on Hezbollah. No serious expert on Iran believes the argument about enabling a regime change [via air power]. On the contrary, whereas the presumed goal is to weaken or disable the leadership and then replace it with others who would improve relations between Iran and the United States, it is far more likely that such strikes would strengthen the clerical leadership and turn the United States into Iran's permanent enemy. (my emphasis)