Ho Chi Minh City, July 7 -- The Ho Chi Minh City High Command said on July 7 that it is coordinating with domestic and foreign agencies and units to collect information and locate burial sites of martyrs who died in the Tan Son Nhat airport attack on the night of January 30 and early morning of January 31, 1968 (the first and second days of the Mau Than Lunar New Year). Historical documents and domestic and international sources suggest that two mass graves may exist in the western end area of Tan Son Nhat airport, where many soldiers who died in the battle were buried The command called on veterans who participated in or have information about the 1968 battle; former US and allied servicemen who operated in the airport area; martyrs' rel...