The first successful test of a Hypersonic Technology Demonstration Vehicle or HSTDV --which can be used for futuristic missile system and aircraft -- was conducted today off the coast of Odisha. So far, Russia, China and the US have been developing hypersonic test vehicles. A hypersonic cruise missile, once developed, can defeat any Chinese defensive system, scientists said.Defence research organisation DRDO, which conducted today's test, called it a "historic mission", which was "a giant leap in indigenous defence technologies and significant milestone" towards a Self-Reliant and Empowered India.