Wikipedia has a lot of info about AO. It tells about AO in Thailand.though it was sprayed on the perimeter Ao drifted across the flight line parking ramp through the barracks and got on the food that was locally purchased for the Chow hall.I remember the small green onions that we ate in Takhli. I talked to a USAF old friend who stayed in and he said the troops in Vietnam liked when they sprayed because it made the air cool