We may claim that, but silos full of Minutemen say different. Iran is shooting ballistic missiles which are hypersonic. The lowly Scud from Iraq is hypersonic @ Mach 5.
You may be confusing air-launched hypersonic weapons like the ones with which Russia is pummeling Ukeville. I doubt that Iran has those and if they did they got them from the Russkies. We have tested one, which means we have them as well up to Mach 20 allegedly. Most ground based tactical missiles are supersonic except the FROG which is just a rocket. Iran may actually have those but are useless in this fight.
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Yes, well, I am no expert of the technology but I think the term they are using is up around Mach 25 or greater. 'High' Hypersonic weaponry enters a field of physics where all the aerodynamics, guidance physics, structural heating - everything - seems to change dynamically. I have to admit I am doubtful that we really lack such technology; the old X-15 was capable of Mach 6.7; the Lockheed SR-71 Blackbird circulated fuel through the skin to compensate for heat and I think it only claimed a little above Mach 3 ???? 🤷♂️
At any rate, whoever possesses this 'secret' ultra high speed technology, I doubt that they would loan it to Iran. From the way you use the term 'hypersonic' I guess any ballistic missile could be called 'hypersonic'.
That Chinese balloon that raised such a fuss a while back was capable of hanging 5 'hypersonic' missiles below it - I have posted a picture of that configuration. I called it a 'first strike' configuration.