US scrambles to match China’s air-breathing hypersonic missiles with Darpa programme

A year after China unveiled the world’s first operational air-breathing hypersonic missiles, the United States is launching a programme to double down on developing similar weapons. The US Defence Advanced Research Projects Agency (Darpa) will bring contractors together later this month to lay out what it wants from the Next Generation Hypersonic Cruise Missile, with air-breathing propulsion at the heart...