Russia’s most-advanced anti-aircraft and anti-missile weapons are already being delivered to the military, the president has said The Russian military is in the process of deploying the S-500, the most advanced air-defense system in the country, President Vladimir Putin said on Tuesday. The Russian leader made the announcements during an address to the graduates of military colleges in Moscow as he described Russia’s plans for fielding advanced weapon systems, which he said: “will determine the combat capabilities of the army ...