In this photo provided by the United States Department of State, U.S. Secretary of State Rex Tillerson addresses U.S. Mission Nigeria staff at a Meet and Greet at U.S. Embassy Abuja in Nigeria on March 12, 2018.  US President Donald J. Trump announced on Tuesday, March 13, 2018 that he is removing Tillerson from his post and replacing him with CIA Director Mike Pompeo.<br /> CAP/MPI/CNP/RS<br /> &copy;RS/CNP/MPI/Capital Pictures