USA made AAs have been extensively hyped up, aggressively marketed (including by Hollywood) and sold as protection payments mainly to Middle Eastern dictatorships (e.g. Saudi Arabia, UAE. etc.) We all remember how poorly the Patriots performed in the Gulf War. Only 15-20% success rate practically equal to TOTAL FAILURE. And that was against SCUDs with simple ballistic trajectories. No US-made SAMs have ever been tested against a modern, technologically advanced foe. This includes THAAD as well. And with the emergence of new high-tech MIRVs with orbital maneuvering capability and hypersonic missiles they have absolutely no chance whatsoever. The only valid defense against future missile attacks is the deterrence posed by our own ability to counter-attack with the exact same technology.