The Air Force is looking to invest more than $1 billion over the next five years and will publish a request for proposals this spring to upgrade a developmental Navy guided missile that's intended to enhance the F-35 fighter jet's performance against anti-access/area-denial defenses. The Advanced Anti-Radiation Guided Missile-Extended Range that Northrop Grumman is building for the Navy is itself a modified weapon -- adding hardware and software capabilities to the AARGM missile's guidance and control sections, a new rocket...