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 IMAGE: Download Image: Full Size (0.74 MB) Tags: Travels , Pacific Command, James N. Mattis, SecDef, PACOM, Indo-Pacific Photo By: Sgt. Amber I. Smith VIRIN: 180125-D-SV709-0317.JPG Photo Gallery