Syrian and Russian air strikes and artillery fire have made the rebel-held enclave of Eastern Ghouta “hell on Earth”.
About 1,100 civilians have been killed, including hundreds of women and children, during more than three weeks of bombardment.
The US wants an immediate ceasefire and the backing of the UN Security Council.
So who can enforce a new ceasefire and would Washington go it alone?
Presenter: Hashem Ahelbarra
Vyacheeslav Matuzov – former Russian diplomat
Chris Doyle – Director, Council for Arab-British Understanding
Hassan Yari – Professor of International Relations and Security Issues, Sultan Qaboos University, Oman