As the Air Force prepares to build a fiscal year 2020 budget request that reflects the priorities of the forthcoming National Defense Strategy, the service this week began a two-month zero-base review of its programs to determine how and whether they help increase lethality against future threats. Air Force Undersecretary Matt Donovan said during a Jan. 18 Air Force Association event the review will span the service's entire portfolio. "Everything will be on the table during this review, and programs...