Syria ceasefire collapses

Hopes for the ceasefire in Syria vanished almost at once, after a US airstrike on Syrian troops which Washington said was an accident, and an attack on an aid convoy which both Russia and Syria denied carrying out. Have we reached the point that diplomats call "mutually hurting stalemate" -- when parties to a conflict are all so badly hurt that there is nothing more to be gained from fighting? Mohamed Yehia from BBC Arabic and diplomatic correspondent James Robbins at the United Nations assess the chances.
Photo: A damaged aid vehicle in Syria.
Credit: Aleppo 24 News via AP