Chemical weapons have horrified mankind since their first widespread use almost a century ago. The world has come to recognise their use as a flagrant violation of international law. As the US once again beats the drums of war towards Syria, we ask how justified such an intervention is, given the conflicting evidence and the widespread opposition to it. Will a strike help stop the war, or will it drag the whole region into a more brutal and protracted conflict? To wrestle over these issues, Oksana is joined by Kenneth Roth, the Executive Director of Human Rights Watch.