Russia has reportedly tested the readiness of its air defense systems in Crimea, an apparent show of force as Ukraine and NATO countries hold military drills in the Black Sea as part of their Sea Breeze 2021 exercise.
Russia's War Against Ukraine
Al Jazeera: Russia tests S-400 missiles in Crimea amid tensions with Ukraine
Russian S-400 anti-aircraft missile systems move through Red Square during the Victory Day military parade in Moscow on May 9, 2021.
