The S-400 Triumph is an anti-aircraft weapon system developed in the 1990s by Russia's Almaz Central Design Bureau as an upgrade of the S-300 family. It has been in service with the Russian Armed Forces since 2007. In 2017 the S-400 was described by The Economist as "one of the best air-defence systems currently made". According to Siemon Wezeman Senior Researcher of SIPRI the S-400 "is among the most advanced air defence systems available".
https://air-defense-systems.blogspot.com/
https://air-defense-systems.blogspot.com/
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