What is the fine-grained topic of the following text: Photo: Marin Lystsev/TASS of the Anti-aircraft weapon of the Russian air base Hmeymim in Syria for the last month was destroyed and have neutralized 47 unmanned aerial vehicles of terrorists, the official representative of the Ministry of Defence Igor Konashenkov has reported. Only return the topic.
Anti-aircraft weapon of Russian air base in Syria destroys 47 terrorist drones