Cheney was the only one to make the case for the United States to bomb the facility itself. To him, it came down to American credibility. After North Korea tested its nuclear bomb in October 2006, Bush had drawn a red line, warning of dire consequences if Pyongyang were caught proliferating nuclear technology. Well, Cheney argued, they had just been caught. Bush’s warning had to mean something; otherwise what was the point? If America did not follow through, he said, then the mullahs in Tehran certainly did not have to worry about defying the world on Iran’s nuclear program.

