Trying something new here… a brief summary of everything you need to know about complex defense topics, starting with the S-400.Russia’s S-400 Triumf, often referred to as the SA-21 Growler within NATO circles, is widely touted as the most capable air defense system in the world. But while the S-400 is indeed very capable, it’s not quite the stealth-defeating powerhouse that it’s made out to be.