Shanahan Handshake Acting Defense Secretary Patrick M. Shanahan shakes hands with Ukrainian Defense Minister Stepan Poltorak at the NATO defense ministers meeting in Brussels, Feb. 14, 2019. SHARE: Download: Full Size (0.96 MB) Tags: Shanahan , Acting Defense Secretary Credit: Army Sgt. 1st Class Clinton M. Carroll VIRIN: 190214-A-ZZ999-0071.JPG Photo Gallery