Timeline: A history of sarin

Published: Dec 24 2013 05:01:00 AM EST   Updated On: Sep 16 2013 11:24:47 AM EDT
scientist doing experiment, medicine, chemistry

A United Nations report due out Monday is expected to say say the perpetrators of last month's chemical weapons attack in Syria had up to 350 liters of sarin gas Look back at the history of sarin, a man-made nerve agent.