"Russian strategic missile troops reportedly launched an RS-18 ballistic missile on Tuesday. The launch may have been a test of the advanced hypersonic glider warhead, which would be able to defeat US anti-missile systems.
The test was conducted at midday from a site near the town of Yasny, Orenburg region, in the southern Urals, and reached the Kura test range in Kamchatka in Russia’s Far East.
“The test was a success. The warhead was delivered to Kura field,” the Defense Ministry reported."
Probably propaganda. Its Russia, remember?. Besides, Russia is famous for building big badass things that have no use in the real world and eventually crash and burn.