Mattis Handshake Defense Secretary James N. Mattis shakes hands with Afghan service members at Resolute Support headquarters in Kabul, Afghanistan, Sept. 7, 2018. SHARE IMAGE: Download Image: Full Size (1.34 MB) Tags: Mattis, Defense Secretary Photo By: Dominique A. Pineiro VIRIN: 180906-D-PB383-004.JPG Photo Gallery