Syria crisis: UN chemical weapons task 'doable'
18 September 2013 Last updated at 09:02 BST
The chief UN weapons inspector has told the BBC he thinks it will be difficult to find and destroy all of Syria's chemical weapons, but he believes it is achievable.
Ake Sellstrom, who led weapons inspectors on their visit to Syria last month, said much depended on whether the Syrian government and the opposition were willing to negotiate.
But he said that despite finding clear evidence that the nerve agent sarin was used in an attack on the outskirts of Damascus, the team could not conclusively show who was responsible.