Russia’s Defense Ministry has cautioned the US-led coalition of carrying out airstrikes on Syrian army positions, adding that Syria has numerous S-300 and S-400 air defense systems up and running. From RT News: Russia’s Defense Ministry has cautioned the US-led coalition of carrying out airstrikes on Syrian army positions, adding that Syria has numerous S-300 and S-400 air defense systems up and running. Share this:TwitterFacebookLike this:Like Loading... Related