China has tested a new space capability with a hypersonic missile which has the ability to strike targets around the world with a nuclear warhead.
The reported test comes as US-China tensions have mounted and Beijing has stepped up military activity near Taiwan, the self-ruling US-aligned democracy that Beijing considers a province awaiting reunification.
Hypersonic missiles, like traditional ballistic missiles which can deliver nuclear weapons, can fly at more than five times the speed of sound.
But ballistic missiles fly high into space in an arc to reach their target, while a hypersonic flies on a trajectory low in the atmosphere, potentially reaching a target more quickly.
Crucially, a hypersonic missile is maneuverable (like the much slower, often subsonic cruise missile), making it harder to track and defend against.
While countries like the United States have developed systems designed to defend against cruise and ballistic missiles, the ability to track and take down a hypersonic missile remains a question.