Boeing said this week the company continues "to make progress" on KC-46 flight testing and, when pressed, did not dispute the Air Force's schedule projection that the first new tanker will be delivered next spring. The Air Force originally anticipated the first 18 new tankers would be on hand last month to meet the program's Required Assets Available milestone. Last year, the service announced it would shift that milestone to October 2018, with initial deliveries anticipated by December 2017. Then...