The Air Force has already built and flown a prototype of its first new fighter jet in two decades

https://taskandpurpose.com/military-tech/air-force-fighter-jet-prototype-next-generation-air-dominance?fbclid=IwAR0H0mrjfiXJPjntJwCP4i6pa5X9XVSyNIUPIypk972B9w93pRVuA2cfV_o