Pacific Northwest National Laboratory

In this image provided by the Department of Energy, chemist Brian Dockendorff works on a mass spectrometer at the Pacific Northwest National Laboratory in Richland, Wash., Wednesday, Sept. 4, 2013. (AP Photo/Carlos Fraga)

Labs seeking sarin chemical signature: 99-125-81

WASHINGTON (AP) — Three simple numbers will prove whether sarin was used to gas Syrians last month: 99-125-81. Chemists this week around Europe are feeding samples of bodily tissue and dirt collected after chemical attacks […]



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