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  3. Secretary Kirstjen M. Nielsen (Official Photo)

Secretary Kirstjen M. Nielsen (Official Photo)

Image: Secretary Kirstjen M. Nielsen (Official Photo)
Kirstjen M. Nielsen was sworn-in as the sixth Secretary of Homeland Security on December 6, 2017. Secretary Nielsen is the first former Department of Homeland Security (DHS) employee to become the secretary. (DHS Photo by Department of Homeland Security/Released)