Red Flag-Alaska 20-3 comes to a close > U.S. Air Force

https://www.af.mil/News/Article-Display/Article/2316770/red-flag-alaska-20-3-comes-to-a-close/ 

US Air Force closer to finishing critical designs, ‘hard engineering' for B-21

https://www.janes.com/defence-news/news-detail/us-air-force-closer-to-finishing-critical-designs-hard-engineering-for-b-21 

USAF to launch ARES modernisation plan for F-22 fighter

https://www.janes.com/defence-news/news-detail/usaf-to-launch-ares-modernisation-plan-for-f-22-fighter