Pentagon Meeting Acting Defense Secretary Patrick M. Shanahan walks up the Pentagon steps with Austrian Defense Minister Mario Kunasek following a welcoming ceremony, April 10, 2019. SHARE: Download: Full Size (3.18 MB) Tags: Shanahan, Acting Secretary of Defense Credit: Army Sgt. Amber I. Smith, DOD VIRIN: 190410-D-SV709-0155C.JPG Photo Gallery