In Syria, women and children were among the dozens found dead under suspicious circumstances this week. Rebel forces said more than 1,000 people were killed by the government in a chemical weapons attack, while the authorities dismissed the report as "baseless".
So, where does this incident leave the international community, if the so-called red line has been crossed? And is a political solution still possible for Syria?
To discuss this, Inside Story, with presenter Jane Dutton, is joined by guests: Dina Esfandiary, a research associate on the non-proliferation and disarmament programme for the International Institute for Strategic Studies, who specialises in chemical weapons and security; Firas Abi Ali, the head of the Middle East and North Africa country risk team for IHS Global; and Nikolaos Van Dam, the former Dutch ambassador to Egypt and Iraq.
