Look at recent history, writes Sheldon Richman. In 2003 Iraq's government had no nuclear weapons. The U.S. government invaded, and before long Iraqi President Saddam Hussein was hanging from a rope. In 2011 Libya's government had no nuclear weapons. The U.S. government led NATO on a bombing campaign to help a group of rebels, and before long Libyan Col. Muammar Qaddafi lay dead on a roadside. Today Syria has no nuclear weapons. The U.S. government and NATO are currently aiding rebels seeking to overthrow President Bashar al-Assad. On the other hand, North Korea has nuclear weapons, and Supreme Leader Kim Jong-un appears safe from any regime change sponsored by the U.S. government and NATO. Lesson for foreign leaders who are in the doghouse with the U.S. government: Get a nuke. But Iran is not building a bomb.