Michael Lewis’s new profile of Barack Obama in the October issue of Vanity Fair provides a rare insider look at how the president makes his decisions. The main focus of the profile are the days leading up to his secure of a U.N. resolution to take “all necessary measures” to protect Libyan civilians, and then “use American airpower to destroy Qadaffi’s army.” A source who was in the Situation Room when the decision was being made tells Lewis that Obama “went off the road map,” summarily shooting the two options given to him by the Pentagon: Establish a no-fly zone, which advisers admitted would not end the massacre, or do nothing at all. On why he balked at the idea of not intervening: “That’s not who we are.”