Mattis Greeting Defense Secretary James N. Mattis meets members of the Colombian military during his visit to Bogota, Colombia, Aug. 17, 2018. SHARE IMAGE: Download Image: Full Size (0.26 MB) Tags: James N. Mattis, SecDef, Southern Command, Southcom Photo By: U.S. Embassy photo VIRIN: 180820-D-ZZ999-002A.JPG Photo Gallery