Russia's Lieutenant General Igor Kirillov, in charge of Russian troops for radioactive, chemical and biological protection, speaks at a briefing in Moscow. (Photo: AFP)
A man walks past a portrait of late Syrian president Hafez al-Assad displayed at the main entrance of a building in the capital Damascus on Dec. 9. (Photo: AFP)
Oct. 14, 2019 photo, Turkey-backed Syrian opposition fighters fire a heavy machine-gun towards Kurdish fighters, in Syria's northern region of Manbij. (Photo: AP)