Mattis Meets With Bulgarian Defense Minister Defense Secretary James N. Mattis greets Bulgarian Defense Minister Krasimir Karakachanov ahead of bilateral discussions at NATO headquarters in Brussels, Feb. 15, 2018. NATO photo SHARE IMAGE: Download Image: Full Size (1.93 MB) Tags: Bulgaria , James N. Mattis, SecDef, NATO Photo By: NATO photo VIRIN: 180215-O-ZZ999-221.JPG Photo Gallery