The U.S. Air Force is flying retired F-117A Nighthawk stealth fighters as threat-representative aircraft in Red Flag wargaming exercises, simulating China’s Chengdu J-20 and Russia’s Sukhoi Su-57 in combat training scenarios against F-22 Raptor and F-35 Lightning II pilots. The Pentagon is preserving the aging fleet specifically for this mission. The F-117 Nighthawk Never Really Retired Pentagon “Red Teaming” has enabled many developmental brea…