SEOUL, South Korea — All six crew members of a KC-135 refuelling aircraft supporting operations against Iran are dead, the U.S. military said Friday, after their plane crashed in western Iraq. The U.S. Central Command, which oversees the Middle East, said the crash followed an unspecified incident involving two aircraft in “friendly airspace,” and that the other plane landed safely. The crash brings the U.S. death toll in Operation Epic Fury to at least 13 service members, seven of whom were killed in combat. About 140 U.S. service members have been...