MS South Vietnamese man in cave entrance, US Army GI crouched outside; both stop to use radios. MS S. Vietnamese tunnel rat & GI walking down rock cluster. MS GI leaning against rock with M-16 in hand. MS African American GI walking by cam, cigarette in mouth & M-16 in hand; a Caucasian GI with radio pack and M-16 peers into brush. MCU GI with "Nancy" scrawled onto helmet walking by cam. MSs soldiers marching up incline, trudging through brush. MS GIs entering cave, S. Vietnamese guide / informant watching. MCU Caucasian soldier wearing helmet, at rest. MS two soldier resting on hill, one cleaning M-16, the other talking on field radio.