Pantsir-S1 air defense system guarding the air base in Latakia, Syria

A Russian Pantsir-S1 air defense system, probably on a tracked GM-352 chassis, is seen on behind a concrete mixer in this photo handout from the Russian Ministry of Defense.

Russian Sukhoi Su-24 at Latakia (3)
Mil.ru [CC BY 4.0], via Wikimedia Commons