In this Monday, Sept. 10, 2018 photo, an armed man rides his motorcycles in the centre of the northern city of Idlib, Syria. Syrian government forces, backed by Russia and Iran, have been massing troops for weeks in preparation for an attack on Idlib province, the last major rebel stronghold in the country. The U.N. has warned that a battle will spark a humanitarian catastrophe, where more than 3 million people live in the territory, nearly half of them already displaced from fighting elsewhere in Syria. (Ugur Can/DHA via AP), APTOPIX