This course of weapons dates to not less than the eighties, when Israel designed the Harpy loitering munition to be used from the suppression of enemy air defenses (SEAD). China would later purchase the Harpy from Israel in 1994 and has been studying loitering munitions for more than 20 years. https://zionkykwg.blog5star.com/38785198/construction-drone-survey-bangladesh-options