Airbus Group's U.S. business has slimmed down for tighter budgets, rebranded and is now prepared to make greater investments in the defense market, the company's chief executive said this week. Early this year, Allan McArtor took over the renamed and reorganized Airbus Group Inc., the U.S.-based Airbus Group unit that includes the business formerly known as EADS North America. He is also chairman of Airbus Americas, Airbus Group's commercial aircraft division in North and South America. Since taking over, McArtor...