Korean fighter at the turn

The aircraft's creation program [KF-21 ](https://defence24.pl/defense-policy/Polish-general-za-sterami-kf-21) was conducted in textbooks. Six prototypes performed a full of 1,600 flights, and a full of 13,000 tests were conducted. The program was completed not after the time, but 2 months earlier than anticipated the schedule. This in itself seems to be a miracle, given the delays of American air programs, where delays are usually recorded in years.