King Savang Vatthana and Queen Khamphoui being greeted by American nurses Diana "Dee" Dick (left, USAID) and Brenda Peters (IVS) at the Sam Thong airstrip. Gen. Vang Pao (Vaj Pov) (Commander, Military Region II) is on the left. Sam Thong was the USAID refugee operations center for northeastern Laos from 1962 until its fall on March 20, 1970.