NAVAL ZONE 3 U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, visits Vietnam Naval Zone 3 in Da Nang, Vietnam, Aug. 15, 2014. Dempsey is the first chairman to visit the country since the Vietnam War. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 674787-F-NWU22-753.jpg Photo Gallery