U.S. Secretary of State Rex Tillerson addresses staff at U.S. Embassy London, United Kingdom on September 14, 2017

U.S. Secretary of State Rex Tillerson addresses staff at U.S. Embassy London, United Kingdom on September 14, 2017. (State Department photo/ Public Domain

U.S. Secretary of State Rex Tillerson addresses staff at U.S. Embassy London, United Kingdom on September 14, 2017. (State Department photo/ Public Domain