South Korea rolls out the KF-21, joining elite group of global supersonic fighter jet makers

South Korea unveiled its homegrown supersonic jet fighter on Friday, joining an exclusive club of military aviation giants and setting the stage for a $5.2 billion program it hopes will be a top export driver and jobs creator.South Korea unveiled its homegrown supersonic jet fighter on Friday, joining an exclusive club of military aviation giants and setting the stage for a $5.2 billion program it hopes will be a top export driver and jobs creator.