KC-46 prime contractor Boeing will not be able to deliver on its key required assets available milestone to deliver 18 new tankers by August 2017 and will miss the deadline by more than one year, the Air Force announced Friday. A schedule risk assessment completed this month revealed the company will not be able to deliver on a major contractual milestone until October 2018 -- 14 months later than the company's fixed-price contract dictates, according to an Air Force press...