Mattis Remarks Defense Secretary James N. Mattis speaks at the change-of-command ceremony for U.S. Indo-Pacific Command as Navy Adm. Philip S. Davidson assumed command from Adm. Harry B. Harris Jr., at Joint Base Pearl Harbor-Hickam, Hawaii, May 30, 2018. Air Force photo by Airman 1st Class Nathan H. Barbour SHARE: Download: Full Size (1.55 MB) Credit: Airman 1st Class Nathan H. Barbour VIRIN: 180530-F-ID393-0047A.JPG Photo Gallery