Syria has been engulfed in bloody conflict for seven long years. With peace talks derailed, and ceasefires violated, the outlook is as grim as ever.
Russia has consistently vetoed UN resolutions on Syria, using its permanent seat on the Security Council to bolster its ally, Syrian President Bashar al-Assad. It has blocked an investigation into the use of chemical weapons on civilians.
Far from burning itself out, the conflict is becoming more toxic the longer it continues, with increasing sectarianism, and greater external involvement fuelling the bloodshed. A UN commission of inquiry found that all parties in the conflict have committed war crimes, including murder, rape and torture.