Business Insider:

Russia’s S-400 advanced air-defense system is designed to shoot down aircraft and missiles and long ranges and high altitudes. But in Ukraine, Moscow has pressed its S-400s into service to intercept US-made HIMARS rockets or, more bizarrely, to bombard Ukrainian cities.

Moscow is portraying tactic this as proof that Ukraine’s air force is so weak that Russian forces can afford to waste expensive anti-aircraft missiles on secondary missions. The more likely reason for it is that desperation and frustration are driving the Kremlin to use every weapon it has, no matter how inappropriate it is for the task.

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