Defense Discussion Defense Secretary James N. Mattis and Australian Defense Minister Marise Payne walk together during the Australia-United States Ministerial Consultation at Stanford University in Palo Alto, Calif., July 23, 2018. DoD photo by Navy Petty Officer 1st Class Dominique A. Pineiro SHARE IMAGE: Download Image: Full Size (1.07 MB) Photo By: Dominique A. Pineiro VIRIN: 180723-D-PB383-033A.JPG Photo Gallery