At the same time, the speaker noted she is sceptical about a possible restoration of the Russian-US Intermediate-Range Nuclear Forces Treaty (INF).
"As for the Intermediate-Range Nuclear Forces Treaty, I believe it was buried, and it would be extremely difficult to revive it", Matviyenko noted.
The Open Skies Treaty was signed in 1992 and became effective 10 years later. The document allowed 34 participating nations to conduct unarmed observation flights over each other's territories.
However, on 21 May 2020, then-US President Donald Trump said his country would pull out of the Open Skies Treaty due to alleged violations by Moscow, something that Russia denied, stressing that all of the agreement-related issues Washington raised could be discussed within the framework of the Open Skies Consultative Commission.
US participation in the treaty officially ended on 22 November, prompting Russia's withdrawal from the accord.
A year before, the US pulled out of the Intermediate-Range Nuclear Forces Treaty. Addressing the withdrawal, Russian President Vladimir Putin presented a new initiative saying that Russia was ready to abstain from deploying 9M729 missiles on its territory in Europe — if NATO would make reciprocal moves, but it was left unanswered by Washington.