The Royal Australian Air Force (RAAF) will soon test launch prototypes of the US Air Force’s Hypersonic Attack Cruise Missile (HACM). The tests will be carried out on American-built Australian Air Force F/A-18F Super Hornets. The race is on among the great powers to develop hypersonic missiles. Russia was possibly the first to field what it claims to be hypersonic missiles (although these seem to have been repeatedly intercepted by American-made Patriot systems in Ukraine).