Secretary Cohen responds to a reporter's question at a Tomb of the Unknown briefing in the Pentagon. Secretary of Defense William S. Cohen responds to a reporter's question concerning the testing of the remains from the Vietnam War interred in the Tomb of the Unknown at a briefing in the Pentagon on June 30, 1998. After successful mitochondrial DNA comparison and forensic examination using state-of-the-art technology not available in 1984, the U.S. Army Central Identification Laboratory has determined that the remains interred in 1984 as the Vietnam Unknown are those of U.S. Air Force 1st Lt. Michael Joseph Blassie. SHARE: Download: Full Size (0.02 MB) Credit: VIRIN: 572423-R-UHG03-217.jpg Photo Gallery