Secretary of Defense Jim Mattis and Finland’s President Sauli Niinistö speak to the media at the Presidential Palace in Helsinki, Finland, Nov.

Secretary of Defense Jim Mattis and Finland's President Sauli Niinistö speak to the media at the Presidential Palace in Helsinki, Finland, Nov. 6, 2017. (DOD photo by U.S. Air Force Staff Sgt. Jette Carr)

Secretary of Defense Jim Mattis and Finland’s President Sauli Niinistö speak to the media at the Presidential Palace in Helsinki, Finland, Nov. 6, 2017. (DOD photo by U.S. Air Force Staff Sgt. Jette Carr)