Defense Discussions Defense Secretary Jim Mattis, center, and Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, at left, participate in the 49th Security Consultative meeting in Seoul, South Korea, Oct. 27, 2017. DoD photo by Navy Petty Officer 1st Class Dominique A. Pineiro SHARE IMAGE: Download Image: Full Size (0.68 MB) Tags: JIm Mattis, asia-pacific, Pacific Command, SecDef, Chairman, Joe Dunford, PACOM Photo By: Dominique A. Pineiro VIRIN: 171028-D-PB383-022.JPG Photo Gallery