Defense Ministerial Defense Secretary James N. Mattis walks with South Korean Defense Minister Song Young-moo before beginning the South Korean Defense Ministerial in Seoul, South Korea, June 28, 2018. SHARE IMAGE: Download Image: Full Size (0.58 MB) Tags: Indo-Pacific, Mattis, Defense Secretary Photo By: Sgt. Amber I. Smith VIRIN: 180628-D-SV709-0662M.JPG Photo Gallery