 Complete the following phrase:  Prior to September 2013 Syria was one of a handful of states which had not ratified the Chemical Weapons Convention, and had not publicly admitted to possessing chemical weapons, although Western intelligence services believed it to hold a massive stockpile. In September 2013, French intelligence put the Syrian stockpile at 1,000 tonnes, including Yperite, VX and several hundred tonnes of sarin. After international condemnation of the August 2013 