In 2007, the private security firm Blackwater was at the height of its influence in Iraq and making millions of dollars off government contracts. But in September of that year, Blackwater personnel fired into a crowd of men, women and children at Baghdad’s Nisour Square, killing 17 and badly damaging relations between the two countries. US officials had already heard that the military contractors saw themselves as “above the law” and Iraq as a variation on the ‘OK Corral.’ That’s according to newly released documents obtained by James Risen of the New York Times.