Every Tuesday morning during the Iraq war Washington's opinion-makers and journalists knew there was only one place to be: at the "black-coffee briefings" held at the American Enterprise Institute, a fortress-like building on M and 17th streets, opposite the main offices of the National Geographic magazine. Technically, AEI is a thinktank. More than that, though, it is the headquarters of the intellectual movement known as neoconservatism. Its staff includes famous names such as Richard Perle, Irving Kristol and Newt Gingrich. The magazine Weekly Standard, the neocon bible, is published at the same address. Black coffee was not strictly compulsory at...