Detailed text transcripts for TV channel - MSNBC - 20130426:01:16:00
Assessment from the u.s. intelligence community, we don't know for sure. in that case you can't necessarily identify the providence of some of these samples, can't say for sure where they came from or when they came from, is it possible they can seem to indicate something that might be disproven had we understand their providence better? >> if you're using samples indeed genuine, then you're probably running them through very specific equipment like gas chromatograph mass spectrometer and there are very particular chemical signatures for chemicals out there and their degradation by-products, h...