Honoring Troops Defense Secretary James N. Mattis and Vietnamese Defense Minister Ngo Xuan Lich honor troops in Hanoi, Vietnam, Jan. 25, 2018. DoD photo by Army Sgt. Amber I. Smith SHARE: Download: Full Size (0.74 MB) Credit: Sgt. Amber I. Smith VIRIN: 180125-D-SV709-0317.JPG Photo Gallery