171221-N-TP832-013 JACKSONVILLE, Fla. (Dec. 21, 2017) Secretary of Defense James Mattis speaks with Sailors assigned to Helicopter Maritime Strike Squadron (HSM) 40 during a surprise visit to Naval Station Mayport. Mattis used the visit as an opportunity to interact with Sailors, answer their questions, show his support and personally thank Sailors who will be standing watch during the holidays. (U.S. Navy photo by Mass Communication Specialist 2nd Class Michael Lopez/Released)