Kristofer Harrison was a Defense and State Department advisor during the George W. Bush administration, and is a principal of ITJ Strategies.
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Kristofer Harrison
Investigators collate forensic samples near the Maltings shopping center in Salisbury, England, on March 16, as investigations continue after a former Russian spy and his daughter were apparently poisoned in a nerve agent attack on March 4.
(Ben Stansall/AFP/Getty Images)