dEFENSE lEADERS Defense Secretary James N. Mattis hosts Estonian Defense Minister Juri Luik for a meeting at the Pentagon, March 7, 2018. DoD photo by Army Sgt. Amber I. Smith SHARE IMAGE: Download Image: Full Size (0.4 MB) Photo By: Army Sgt. Amber I. Smith VIRIN: 180307-D-SV709-0019.JPG Photo Gallery