Secretary Panetta visits with Vietnamese Prime Minister Nguyen Tan Dung in Hanoi Secretary of Defense Leon E. Panetta visits with Vietnamese Prime Minister Nguyen Tan Dung in Hanoi, Vietnam, on June 4, 2012. Panetta is on ten-day trip to the Asia-Pacific to meet with defense counterparts. SHARE IMAGE: Download Image: Full Size (0.08 MB) Photo By: VIRIN: 316384-K-QJO31-569.jpg Photo Gallery