Trilateral Walk Defense Secretary James N. Mattis walks with Finnish Defense Minister Jussi Niinisto, left, and Swedish Defense Minister Peter Hultqvist at the Pentagon, May 8, 2018. DoD photo by Navy Petty Officer 1st Class Kathryn E. Holm SHARE IMAGE: Download Image: Full Size (1.25 MB) Photo By: Kathryn E. Holm VIRIN: 180508-D-SH953-1045C.JPG Photo Gallery