Alarm over Russian nuclear space weapons, but Moscow denies it. The Kremlin: 'US invention to get aid approved for Kiev' The exact nature of Russia's new nuclear capabilities in space is not yet clear.

Some experts wonder why Moscow should use atomic weapons to destroy enemy satellites when less lethal and sophisticated means are sufficient. But Washington has long been chasing Russia and China in the race for new weapons. Like hypersonic missiles, which are still in the experimental phase in the US but which Moscow has already used in Ukraine.