WASHINGTON (AFP) - An Iraq war veteran was facing murder charges Monday for allegedly gunning down two men, one of whom was a former Navy SEAL sniper whose exploits in the same conflict were detailed in a best-selling book. Chris Kyle, who wrote “American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History,” and his friend Chad Littlefield were shot dead at a firing range in Glen Rose, Texas on Saturday, authorities said. The two men are believed to have taken the suspected gunman, former US Marine Eddie Routh, 25, to the range where the shooting took place.