A new Pentagon assessment of the defense industrial base says Boeing's prospects for continued fixed-wing military aircraft construction are bleak, noting that Air Force and Navy plans to wrap up major purchases of cargo and fighter planes may force the Chicago-based company to shutter two major assembly lines. In the congressionally mandated annual report to Congress, which assesses all aspects of the industrial base, the Defense Department says the planned end to Air Force C-17 cargo plane purchases, as well...