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![The KF-21 Boramae, the country's first indigenously developed supersonic fighter jet, flies over Seoul Air Base in Seongnam, Gyeonggi, during a test flight held Monday, a day before the six-day 2023 Seoul International Aerospace & Defense Exhibition (ADEX) officially begins. [NEWS1]](https://image.koreajoongangdaily.com/11002721.jpg?imageId=11002721&width=240&height=184&format=webp&format=jpg)
![The Korean-developed fighter jet KF-21 Boramae firing an air-to-air missile during a test run at the Air Force’s 3rd Flight Training Wing in Sacheon, South Gyeongsang on Tuesday. According to the Defense Acquisition Program Administration, the 4.5 generation fighter jet successfully carried out its first armament tests, including firing 100 rounds from its cannon. Two of the aircraft's four prototypes were used in the armament tests. [DEFENSE ACQUISITION PROGRAM ADMINISTRATION]](https://image.koreajoongangdaily.com/11191418.jpg?imageId=11191418&width=240&height=184&format=webp&format=jpg)