Mattis at USIP Defense Secretary James N. Mattis speaks at the United States Institute of Peace, in a discussion moderated by Stephen J. Hadley, the chair of the institute’s board of directors, in Washington, Oct. 30, 2018. DOD photo by Lisa Ferdinando SHARE IMAGE: Download Image: Full Size (0.48 MB) Tags: James N. Mattis, SecDef, Jim Mattis, United States Institute of Peace Photo By: Lisa Ferdinando VIRIN: 181031-D-BN624-0068.JPG Photo Gallery