United Airlines keeps turning up heat on three Middle East carriers

United Airlines is still in a fighting mood. As will become clear in new data expected to be released tomorrow, Chicago-based United hasn't back off of a heated battle with no fewer than three major international carriers based in the Middle East, including Emirates, Etihad Airways and Qatar Airways, all of which fly nonstop from Chicago's O'Hare International Airport to various destinations in the Gulf region and via connections, to just about every major market in Europe, Africa and Asia...