‘A report from Financial Times‘ Demetri Sevastopulo and Kathrin Hille states that China has tested a nuclear-capable hypersonic glide vehicle that goes into space and traverses the globe in an orbital-like fashion before making its run through the atmosphere toward its target. There would be huge implications if such a system were to be operationalized, and according to this story, which says it talked to five officials confirming the test, the U.S. government was caught totally off-guard by it.
… The foundation of this Cold War-era concept is commonly referred to as a Fractional Orbital Bombardment System, or FOBS, but instead of carrying a traditional nuclear-armed reentry vehicle, this Chinese system would carry a hypersonic glide vehicle that would possess immense kinetic energy upon reentry. As such, it could make a very long maneuvering flight through the atmosphere at very high speeds to its target.
The FOBS concept has long been a concern because of its potential to bypass not just missile defenses, but even many early warning capabilities. Compared to a traditional intercontinental ballistic missile (ICBM), a FOBS can execute the same strikes but from highly unpredictable vectors. Range limitations also become a non-factor and the timing of an inbound strike is also far less predictable….’
— via The Drive