Town Hall Defense Secretary James N. Mattis speaks to defense attachés from various countries during a town hall at the Canadian Embassy in Washington, D.C., Jan. 10, 2018. DoD photo by Army Sgt. Amber I. Smith SHARE: Download: Full Size (1.27 MB) Credit: Sgt. Amber I. Smith VIRIN: 180110-D-SV709-0091.JPG Photo Gallery