WORLD NEWS: General Mattis sends his farewell message as Secretary of Defense, prepares to transfer power to Patrick Shanahan; Lucas Tomlinson reports.

"General Mattis sends his farewell message as Secretary of Defense, prepares to transfer power to Patrick Shanahan; Lucas Tomlinson reports. Trump slows the withdrawal from Syria, says more time is needed to defeat ISIS; Lucas Tomlinson reports. World" Via FOX NEWS To WORLD NEWS