Secretary Handshake Defense Secretary James N. Mattis shakes hands with Omani service members during his visit to Muscat, Oman, March 12, 2018. DoD photo by Army Sgt. Amber I. Smith SHARE IMAGE: Download Image: Full Size (2.07 MB) Photo By: Amber I. Smith VIRIN: 180312-D-SV709-0066.JPG Photo Gallery