The September killing of Iraqi civilians in a shoot-out that involved Blackwater USA security guards makes this documentary on private military contractors especially timely, but it’s essential viewing for anyone who wants to understand the changing nature of war in the 21st century. Directors Nick Bicanic and Jason Bourque interviewed security executives, foreign policy scholars, journalists, and modern-day mercenaries to learn how PMCs have become an integral and problematic component of the U.S. armed forces. The film fully exposes the crisis of well-paid cowboys making Iraq more dangerous for our enlisted men yet never descends into simple finger wagging, arguing instead that private armies are a fact of modern warfare and that their conduct should be regulated by the international community. 86 min.