War without a plan: Iraq invasion supporter David Frum on why a U.S. war with Iran would be a disaster

Atlantic staff writer David Frum was a vocal supporter of the 2003 U.S.-led invasion of Iraq. As President George W. Bush's speech writer, he helped pen the famous "Axis of Evil" speech, which included Iran. But he has since expressed regret for supporting that invasion and now says that any war with Iran will be an even bigger, more destructive mistake.