Submitted by YONHAP on

This photo, released by the Defense Acquisition Program Administration (DAPA) on Feb. 20, 2023, shows a KF-21 prototype fighter conducting a test flight the same day. The fourth prototype of South Korea's homegrown fighter KF-21 Boramae took off from the Air Force's 3rd Flying Training Wing in Sacheon, about 300 kilometers south of Seoul, at 11:19 a.m. and completed a 34-minute flight, according to DAPA. (PHOTO NOT FOR SALE) (Yonhap)