The New Yorker has an article with this title by Seymour Hersh. Among other things, he describes current covert operations by the Pentagon in Iran and plans for future war.

Two quotes from the article:

One Western diplomat told me that the Europeans believed they were in what he called a "lose-lose position" as long as the United States refuses to get involved. "France, Germany, and the U.K. cannot succeed alone, and everybody knows it," the diplomat said. "If the U.S. stays outside, we don't have enough leverage, and our effort will collapse." The alternative would be to go to the Security Council, but any resolution imposing sanctions would likely be vetoed by China or Russia, and then "the United Nations will be blamed and the Americans will say, 'The only solution is to bomb.'"

The Administration has been conducting secret reconnaissance missions inside Iran at least since last summer. Much of the focus is on the accumulation of intelligence and targeting information on Iranian nuclear, chemical, and missile sites, both declared and suspected. The goal is to identify and isolate three dozen, and perhaps more, such targets that could be destroyed by precision strikes and short-term commando raids. "The civilians in the Pentagon want to go into Iran and destroy as much of the military infrastructure as possible," the government consultant with close ties to the Pentagon told me.