American troops in armored vehicles move through the center of Saigon, Vietnam, Feb. 1, 1968, on their way to the city's Chinese sector, Cholon, to help South Vietnamese troops in new street fighting with Viet Cong. (AP Photo)
American troops in armored vehicles move through the center of Saigon, Vietnam, Feb. 1, 1968, on their way to the city's Chinese sector, Cholon, to help South Vietnamese troops in new street fighting with Viet Cong. (AP Photo)