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
For months now, Syria's largest city, Aleppo, has been a battleground. These pictures, taken in Aleppo by the photojournalist Daniel Etter in July and August this year, tell a tale of violence and suffering - and also hope.