Air Force Lt. Gen. Jack Weinstein said this week Defense Secretary Jim Mattis has instructed the military to complete a nuclear posture review in six months -- a time line that could mean the process wraps up around the time the Air Force awards the next phase of nuclear missile modernization. The service intends to award technology-maturation and risk-reduction contracts to up to two companies in the fourth quarter of fiscal year 2017 for both Air Force nuclear missile upgrade...