...While U.S. and European policy makers draw distinctions between reformers and hard-liners in the Islamic Republic, the difference between the two is style, not substance. Both remain committed to Iran's nuclear program. Former Iranian President Mohammad Khatami, for example, called for a Dialogue of Civilizations. The European Union (EU) took the bait and, between 2000 and 2005, nearly tripled trade with Iran.

It was a ruse. Iranian officials were as insincere as European diplomats were greedy, gullible or both. Iranian officials now acknowledge that Tehran invested the benefits reaped into its nuclear program.

On June 14, 2008, for example, Abdollah Ramezanzadeh, Mr. Khatami's spokesman, debated advisers to current Iranian President Mahmoud Ahmadinejad at the University of Gila in northern Iran. Mr. Ramezanzadeh criticized Mr. Ahmadinejad for his defiant rhetoric, and counseled him to accept the Khatami approach: "We should prove to the entire world that we want power plants for electricity. Afterwards, we can proceed with other activities," Mr. Ramezanzadeh said. The purpose of dialogue, he argued further, was not to compromise, but to build confidence and avoid sanctions. "We had an overt policy, which was one of negotiation and confidence building, and a covert policy, which was continuation of the activities," he said.

The strategy was successful. While today U.S. and European officials laud Mr. Khatami as a peacemaker, it was on his watch that Iran built and operated covertly its Natanz nuclear enrichment plant and, at least until 2003, a nuclear weapons program as well...