Secretary Gates escorts Vietnamese Prime Minister Nguyen Tan Dung into the Pentagon. Secretary of Defense Robert M. Gates escorts Vietnamese Prime Minister Nguyen Tan Dung (left) through an honor cordon and into the Pentagon on June 24, 2008. Gates and Dung will meet to discuss a range of regional security issues of mutual interest to both nations. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 131296-D-ACS39-559.jpg Photo Gallery