Author: CNN'S BARBARA STARR

James Mattis addresses DoD in farewell message

Secretary of Defense James Mattis and the State Department's anti-ISIS envoy, Brett McGurk, bid farewell to their respective departments Monday after parting ways with President Donald Trump's administration over his plans to reduce the American presence in Syria.Mattis told Pentagon employees to "keep the faith in our country" and McGurk wished his former colleagues well "as they work under extremely difficult circumstances to protect the interests of our great country.