'No sarin detected in West Ghouta environment, only in human samples' - UN's Angela Kane

 Syria opened its doors to international inspectors and committed to the destruction of its sizeable chemical arsenal.

And yet questions still remain about where, when and by whom chemical weapons may have been used. Is such a Herculean task even possible?

Angela Kane, the UN High Representative for Disarmament Affairs, joins Oksana to discuss these issues.