A new report by the Mitchell Institute for Aerospace Studies recommends that the U.S. Air Force maintain at least two production lines for advanced fighters to ensure their rapid acquisition and fielding. "The Air Force should strive to start new production of major weapon system types every five to seven years," per the study, Building an Agile Force: The Imperative for Speed and Adaptation in the U.S. Aerospace Industrial Base. "This limits technological ambition by allowing technical evolution versus abrupt…
