A Russian S-400 missile air defence systems passes through Red Square with a figure wearing military dress in the foreground with their back to the camera
Russian S-400 missile air-defense systems in Red Square during the general rehearsal of the Victory Day parade in Moscow in May 2022.
  • Ukraine appeared to take out a Russian S-400 system in Crimea with Western ATACMS missiles.
  • The S-400 air-defense system is more advanced than the older ATACMS.
  • Experts told BI that S-400s are Russia's best, but their performance in Ukraine has been mixed.

Ukraine's latest claimed strike on Crimea is likely another example of how its older, Western-supplied missiles can foil even Russia's most advanced air-defense systems.