US cautious on Syrian chemical weaponsTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoTim Jánszky05/01/2013May 1, 2013As the conflict in Syria intensifies, US allegations of chemical weapon use have Washington pondering its response. President Obama has consistently said any use of chemical weapons would be a red line.https://p.dw.com/p/18Pv5Advertisement