exp pmt dr sanjay gupta sarin gas_00005210.jpg
exp pmt dr sanjay gupta sarin gas_00005210.jpg

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    Gupta: Sarin gas most toxic

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Gupta: Sarin gas most toxic

CNN's Dr. Sanjay Gupta explains chemical weapons to Piers Morgan.

Gupta: Sarin gas most toxic

CNN's Dr. Sanjay Gupta explains chemical weapons to Piers Morgan.