(Robert Kersey/Stars and Stripes)

Gio Linh, South Vietnam, March 1967: South Vietnamese Premier Nguyen Cao Ky talks with a blindfolded North Vietnamese prisoner during a visit to an outpost a mile south of the demilitarized zone. Behind Ky is Bill Plante of CBS News. On his way to the camp, Ky criticized American efforts to stop the war, telling reporters the North and South Vietnamese should negotiate alone, without outsiders, “when the time is right.”