U.S. Air Force Col. James Valpiani, Air Force Test Pilot School commandant, speaks with Secretary of the Air Force Frank Kendall during his visit to Edwards AFB, Calif. on May 2nd last year before his flight on the X-62 VISTA (U.S. Air Force Photo)
U.S. Air Force Secretary Frank Kendall said on Monday that a manned Next Generation Air Dominance fighter would require more than $20 billion extra in research and development (R&D), as he laid out options for the incoming Trump administration, including long-range…