Celebrity firearms trainer Travis Haley, who served in Iraq with 2nd Force Reconnaissance Battalion and returned to the country as a Blackwater contractor protecting ambassador Paul Bremer, recently released a riveting first-hand account of a battle in Najaf that occurred ten years ago today. Haley gained notoriety for a viral YouTube video of him engaging members of the Mahdi Army from a rooftop just days after four Blackwater contractors were killed and hung from a bridge in Fallujah. The infamous killings of the four contractors eventually precipitated Operation Phantom Fury — the Marine Corps’ most pitched battle of the Iraq…