US Air Force Has Secretly Built and Flown a 6th gen Fighter Jet

[PLOTUS]

The liming factor of any fighter is does it have a human in it, if it does then you limit the G forces, you have to protect from radiation ( flying high or weapons blast) and from heat of flying at high mark and the need for sleep and rest.

Just a thoought.... if a government was in posession of an extraterrestrial craft, it would likely be retro-engeneered and used in a defense craft, or fighter. Or one would think so.