AP caption reads: "Wounded and tattered 1st Cavalry Division soldiers dash through cemetery-battlefield at Hoai Chau, Vietnam, Jan. 31, 1966, toward waiting evacuation helicopter. The unit was hit by Viet Cong sniper fire and partially evacuated. Then the remainder of the unit was pinned down in crossfire when friendly South Vietnamese troops mistakenly opened fire on them. (AP Photo/Eddie Adams)"