Russia on December 8 displayed some of its mobile air-defense missile systems in central Moscow in a show of military might amid tensions with the West over Ukraine.
Russia's Defense Ministry said the equipment was displayed to mark the 100th anniversary of the creation of Russia's air-defense forces.
The S-400 "Triumph" and Pantsir-S1 surface-to-air missile systems, as well as the Kasta radar station, were publicly displayed outside the Russian Army Theater in Moscow.
President Vladimir Putin said last week that Russia would have enough resources and resolve to defend itself from what he described as enemies seeking to dismember the country.
The West has voiced growing concern over what it says is military muscle flexing by Russia.