Near the end of the Raytheon Technologies YouTube video Missile Defense Agency completes unprecedented homeland defense test can be seen what looks to me like thermal infrared footage of a ship-launched ICBM interceptor doing what it's supposed to do.
I thought I would search for "Halo-IV missile" or "Halo-IV space" but I keep getting sent to things discussing the video game Halo 4 or (occasionally) the Nine Inch Nails box set, neither of which (I assume) is directly related to what's happening here.
Question: Besides the video game and Nine Inch Nails box set, what is HALO-IV? How does it relate to the testing of ICBM interceptors?
Screenshot of the linked video and information from the video's page:
As part of a historic Missile Defense Agency demonstration and for the first time ever, an intercontinental ballistic missile target was intercepted and destroyed outside Earth's atmosphere by an advanced SM-3® Block IIA ballistic missile defense interceptor made by Raytheon Missiles & Defense, a Raytheon Technologies business. Learn more: https://rtxdefense.co/38OWV0N (Video by Mark Wright, Missile Defense Agency)