Bilateral Meeting Defense Secretary James N. Mattis and U.S. Ambassador to NATO Kay Bailey Hutchison meet with Bulgarian Defense Minister Krasimir Karakachanov at NATO headquarters in Brussels, Feb. 15, 2018. U.S. NATO photo SHARE IMAGE: Download Image: Full Size (1.46 MB) Photo By: NATO photo VIRIN: 180217-D-ZZ991-001.JPG Photo Gallery