As the art biennial opens, the smell of violence once again lies in the air in Istanbul. Can a major exhibition respond to the language of the street and fulfil its promise of a free and modern society? By Catrin LorchMore
The ancient ruins of Palmyra are remnants of a bygone golden era. For several days now, the ruins have been controlled by the militias of "Islamic State". UNESCO has warned that the World Heritage site is now at risk of being destroyed.