Sept. 17 - U.N. chemical investigators have confirmed the use of sarin nerve agent in an August 21 poison gas attack outside the Syrian capital, an attack the US says killed more than 1400 people including 400 children. Created by accident in the 1930s by German scientists producing pesticides, the deadly nerve agent has been used as a weapon at least three times in the last 25 years. Jim Drury reports.
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