National Technology Day 2021 marks India becoming the sixth nation to develop nuclear weapons after Pokhran nuclear tests in 1998.

National Technology Day 2021 on May 11 celebrates the achievements and contributions of Indians to science and technology.

In a major leap towards the vision of Atmanirbhar Bharat, DRDO successfully flight-tested HSTDV using an indigenously developed scramjet propulsion system.

The HSTDV is an unmanned scramjet demonstration aircraft for hypersonic speed flight, it can cruise at a speed of mach 6 and move up to an altitude of 32.5 km (20 miles) in 20 seconds, according to the government.