1.

Which two country test-fired a hypersonic missile HIFiRE?

Answer» The US and Australia have jointly test-fired a hypersonic missile capable of moving at a speed eight times faster than sound as part of a $54-million research project. The test was part of a project called the Hypersonic International Flight Research Experimentation Program (HIFiRE) involving the US and Australian militaries, Queensland University, Australia's Defence Science and Technology Group.


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