“In a terse press release, the U.S. Department of Defense announced the first test of the the Advanced Hypersonic Weapon, which launches on a staged rocket and then glides to its target, in a manner similar to the Space Shuttle’s re-entry.
Over at DefenseTech, they argue that the trajectory being different from an ICBM is meant to show that it is not a first strike device, but even the commenters don’t think that explanation flies. The speed of deployment and the ability to strike targets without going high enough to be seen by many advance warning radars makes it a precision surprise attack weapon, a kind of super-cruise-missile for surprise, asymmetric attacks.”
Concept animation here: