Recovery of wounded under fire, near Hill 484, Operation Prairie, October 1966. (Photo by Larry Burrows/AP Photo)





Dropping of troops in support of the South Vietnamese, 1962, Mekong Delta, 1962. (Photo by Larry Burrows/AP Photo)





U.S. Marine, near the DMZ, Operation Prairie, 1966. (Photo by Larry Burrows/AP Photo)





Vietnamese orphans, some wrapped in blankets, sit on the floor of a World Airway DC8 jet as the plane stopped over at Yokata U.S. Air Force Base in northewestern Tokyo, during the Vietnam War, April 3, 1975. The children are the first South Vietnam refugees evacuated aboard an American airliner. (Photo by AP Photo)





Capt. Donald R. Brown of Annapolis, Md., advisor to the 2nd Battalion of the 46th Vietnamese regiment, dashes from his helicopter to the cover of a rice paddy dike during an attack on Viet Cong in an area 15 miles west of Saigon on April 4, 1965 during the Vietnam War. Brown's counterpart, Capt. Di, commander of the unit, rushes away in background with his radioman. The Vietnamese suffered 12 casualties before the field was taken. (Photo by Horst Faas/AP Photo)





Ammunition airlift into besieged Khe Sanh, Operation Pegasus, April 1968. (Photo by Larry Burrows/AP Photo)





An exhausted and wounded South Vietnamese tank soldier is helped to medical station during fighting for a Viet Cong ammunition cache in Cambodia Saturday, May 2, 1970, nine miles north of Prasaut in the northern sector of the Parrot's Beak area. The U.S. Command announced on Saturday that two American troops have been killed in ground fighting in Cambodia. (Photo by AP Photo)





Blindfolded prisoners are taken away by South Vietnamese troops during the Vietnam War, 12th April 1972. (Photo by Ian Brodie/Daily Express/Hulton Archive/Getty Images)





South Vietnamese forces inspecting casualties during the Vietnam War, 12th April 1972. (Photo by Ian Brodie/Daily Express/Hulton Archive/Getty Images)





Medics prepare to evacuate Marine Pfc. Robert E. Herbison of Medford, Ore., after he was wounded in the head and legs by Viet Cong sniper fire, May 5, 1965. Herbison was hit during Marine offensive operation against Viet Cong village complex of Le My, southwest of Da Nang, South Vietnam on May 4. (Photo by Eddie Adams/AP Photo)





A South Vietnamese helicopter is jettisoned overboard from the USS Blue Ridge somewhere off Vietnam, April 30, 1975. The helicopter was one of those discarded from the ship because of damaged condition or to make room for others attempting to land. The aircraft still bears its old U.S. military markings. (Photo by AP Photo)





A South Vietnamese soldier, his weapon at the ready, looks out of a doorway in Saigon on May 9, 1968 to see from which spot Viet Cong snipers are firing. (Photo by John T. Wheeler/AP Photo)





South Vietnamese civilians try to scale the high U.S. Embassy wall in desperate attempts to get abroad on the evacuation flights in Saigon, Vietnam, April 30, 1975. (Photo by Neal Ulevich/AP Photo)





A South Vietnamese soldier steals a few moments of solitude to write a letter seated atop a sandbagged position on Firebase 6 in Vietnam on May 5, 1971. (Photo by Nick Ut/AP Photo)





US Marines run from enemy gunfire to board a helicopter at Khe Sanh during the Vietnam War, 18th April 1968. (Photo by Keystone/Getty Images)





A wounded Marine is comforted upon arriving at this evacuation point at Dai Do, Vietnam on May 7, 1968. The Marine was wounded while attacking the North Vietnamese held village of Dai Do near the DMZ. The artillery-supported North Vietnamese pushed back the Marines. (Photo by Eddie Adams/AP Photo)





Tanks and armored personnel carriers of the Fifth Mechanized Division churn up turf as they leave an encampment just south of the demilitarized zone in South Vietnam on April 25, 1969, showing evidence of the damage inflicted during the night by North Vietnamese engineers. Thirteen GIs were killed, 24 were wounded and seven vehicles were damaged or destroyed when the North Vietnamese hit the encampment in the night, carrying Bangalore torpedoes. (Photo by Robert Ohman/AP Photo)





A Vietnamese man carries his lightly wounded wife out of a threatened area in Southern Saigon, Vietnam on May 8, 1968. Daylong fighting in the area erupted at dawn with a daring Viet Cong attack on a police station. As they did during the Tet Offensive, residents abandoned their homes escaping to safer parts of the city. (Photo by Eddie Adams/AP Photo)





Vietnamese family hold tightly to one another and metal bars of American helicopter on April 27, 1966, as they are flown from home near Duc Ban to Song Be for medical treatment and interrogation. Family was found wounded hiding under shattered tree by U.S. Soldiers of 173rd Airborne Brigades 2nd Battalion after assault into are near Duc Ban where intelligence had said a large force of hard core Viet Cong were encamped. The man, Le Van Minh, was a farmer and possibly Viet Cong. (Photo by John Nance/AP Photo)





Pain etches the face of U.S. Marine as he gets his wound bandaged by medical corpsman Frank Saddler, background, and Cpl. Marvin Shirley, after being hit in the stomach by Viet Cong sniper fire at Le My, South Vietnam, May 4, 1965. Saddler later took the wounded leatherneck's rifle and ran off saying, “I may be needed some place else”. (Photo by Eddie Adams/AP Photo)





A medic offers a seriously wounded friend a cigarette as he waits for medical evacuation following a North Vietnamese ambush while sweeping through heavy jungle west of Dau Tieng, 40 miles northwest of Saigon in Vietnam, May 15, 1969. The armored unit was hit late in the day after sweeping an area hit by B-52 strikes earlier. Two armored companies were hit by an estimated battalion of NVA hidden in well-fortified bunkers. (Photo by Oliver Noonan/AP Photo)





A U.S. Marine mortar crew fires a salvo at a suspected enemy position during a sweep of the Hoa Valley, Southeast of Da Nang in South Vietnam on May 18, 1969. The marines are attached to the 5th Regiment of the 1st Marine Division. (Photo by Hugh Van Es/AP Photo)





U.S. Marines and Navy Corpsmen line up to load casualties aboard H 34 Marine helicopter at Con Thien, just below the demilitarized zone, in Vietnam on May 17, 1967 during the Vietnam War. (Photo by AP Photo)