A U.S. Air Force F-15. (Source: U.S. Airforce)

Lockheed F-35 Dinged as Boeing's F-15X Wins in Air Force's Plan

(Bloomberg) -- The U.S. Air Force outlined a five-year plan that showed the extent of the Pentagon’s push to bring back Boeing Co.’s F-15 fighter in an upgraded version, a $7.8 billion investment t...