the tham piu cave in phonsavan, xiengkhouang province, laos, where at least 374 people were killed during "secret war"

1968 air airforce airstrike america american asia asian attack attraction bomb bombard bombardment cave civil force historic historical history khouang khuang lao laos massacre missile phonesavan phonesavanh phonsavan phonsavanh piu rock rocket secret shelter sightseeing site southeast stone strike tham tourism touristic travel vietnam war xiang xiangkhouang xiangkhuang xieng xiengkhouang xiengkhuang