(CNN) As European leaders grappled with the fallout from the Donald Trump-Vladimir Putin summit Thursday, Russian authorities took the opportunity to show off some of the new weaponry Putin boasted in March would render NATO defenses "completely useless."

In videos posted on YouTube and in stories on the Russian state-run TASS news agency, Moscow gave new detailed looks at five advanced weapon systems -- the Burevestnik nuclear-powered cruise missile; the Avangard hypersonic missile system; the Sarmat intercontinental ballistic missile (ICBM); the Poseidon underwater drone; and the Kinzhal hypersonic missile.

The Russian President has previously proclaimed the great strides made by the country's military, describing the technological advancements as among the best in the world.

But a US military official, speaking shortly after Putin's March speech, cast doubt on the Russian leader's claims . The US assessment was that the weapons were not close to being operational, the official said.

Here's a look at the five weapons:

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