Pentagon Honors Defense Secretary James N. Mattis hosts an honor cordon welcoming Greek Defense Minister Panos Kammenos to the Pentagon, Oct. 9, 2018. SHARE IMAGE: Download Image: Full Size (1.81 MB) Tags: Mattis, Defense Secretary Photo By: Sgt. Amber I. Smith VIRIN: 181009-D-SV709-0072Y.JPG Photo Gallery