Dialogue Discussion Defense Secretary Jim Mattis and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, consult while meeting with members of the Australian and Japanese defense delegation during the Shangri-La Dialogue in Singapore, June 3, 2017. DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro SHARE: Download: Full Size (1.12 MB) Credit: Dominique A. Pineiro VIRIN: 170603-D-PB383-501L.JPG Photo Gallery