U.S. Missile Defense Agency creates tracking system to intercept hypersonic missiles
https://www.armyrecognition.com/weapons_defence_industry_military_technology_uk/u.s._missile_defense_agency_creates_tracking_system_to_intercept_hypersonic_missiles.html
The U.S. Missile Defense Agency, being aware of the advances made by Russia and China in hypersonic missiles technology, is developing a space sensor system to intercept hypersonic missiles in the air. This technology, currently in phase IIa, is called Hypersonic Ballistic Missile Tracking Space Sensor (HBTSS), as reported by Sarah Lavallee in Finance 2nd.