CNN CNN Newsroom September 2, 2013 14:52:00
Samples, if they have been exposed for some days previously, you can identify by chemical analysis whether you have actually seen sarin present. that would be a signature. >> is that conclusive proof? >> yes. you can develop a series of tests and ultimately some very refined determinations through laboratory testing. you can see the area that was presumably exposed was definitely exposed to this chemical. >> couldn't there be false positives? >> you could initially get false positives. not all tests are down to the refinement level of the actual definition of what the chemical makeup is. if th...
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