Secretary Panetta accepts letters written by American service members from Vietnamese Minister of National Defense Senior Lt. Gen. Phuong Quang Thanh in Hanoi Secretary of Defense Leon E. Panetta accepts letters written by American service members from Vietnamese Minister of National Defense Senior Lt. Gen. Phuong Quang Thanh in Hanoi, Vietnam, on June 4, 2012. Panetta returned a diary written by Vietnamese soldier Vu Dinh Doan as part of an exchange of artifacts taken by service members from both nations during the Vietnam War. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 096778-Z-AUU87-409.jpg Photo Gallery