The development of a sixth-generation fighter jet, expected by the 2030s, might face material supply shocks, especially given past delays in US fighter jet development (e.g., F-35). This is compounded by China's progress with their own sixth-generation prototypes.
"historically speaking US fighter jet development is prone to delays at the best of times the current fifth generation F-35 was first conceived in the early90s first flew in 2006 and finally entered service with the US Air Force in 2016 and the Navy in 2019 this was despite the ready availability of rare earth metals from China during this period recent announcements indicate that Boeing has been awarded a contract to develop a sixth generation fighter jet expected to enter service sometime in the 2030s it's not clear though if this ambitious timeline has accounted for any material supply shocks but as China is already flying prototypes of its own sixth generation fighters it's no wonder Washington is prepared to take such drastic measures to develop new supply chains"