WASHINGTON—A U.S. contractor died Wednesday when at least 10 rockets slammed into an air base housing U.S. and other coalition troops in western Iraq, the Pentagon said. Pentagon spokesperson John Kirby said the contractor “suffered a cardiac episode while sheltering” and died shortly afterward. He said there were no service members injured and all are accounted for. British and Danish troops also are among those stationed at the base. The rocket attack was the first since the United States struck Iran-aligned militia targets along the Iraq-Syria border last week, killing one militiaman. No one claimed responsibility for Wednesday’s attack. The rockets struck Ain al-Asad airbase in Anbar province early in the morning, U.S.-led coalition spokesperson Col. Wayne Marotto said. Kirby said the rockets were fired from east of the base, and that counter-rocket defensive systems were used to defend forces at the base. Kirby said the United States can’t attribute …