Subject: Current Events Context: Defence Minister Shri Rajnath Singh visited DRDO’s Dr APJ Abdul Kalam Missile Complex during his visit to Hyderabad on 19th Dec 2020. On this occasion, he inaugurated the advanced Hypersonic Wind Tunnel (HWT) test facility. Concept: The state-of-the-art HWT Test facility is pressure vacuum driven enclosed free jet facility having nozzle […]