Pentagon Visit Acting Defense Secretary Patrick M. Shanahan walks with Greek Defense Minister Evangelos Apostolakis during a visit at the Pentagon, June 7, 2019. SHARE IMAGE: Download Image: Full Size (1.08 MB) Tags: Shanahan, NATO, Acting Defense Secretary Photo By: Army Sgt. Amber I. Smith VIRIN: 190607-D-SV709-0227S.JPG Photo Gallery