Henry Kissinger And Le Duc Tho 1972

Photo of U.S. presidential advisor Dr. Henry Kissinger, left, and Le Duc Tho, right, North Vietnam's chief negotiator, are seen at Gif-sur-Yvette, suburban Paris, just before the beginning of secret talks, Nov. 23, 1972. At center is Nguyen Phuong, a member of the North Vietnamese delegation. (AP Photo/Michel Lipchitz)

President Richard Nixon’s national security adviser, Henry Kissinger, confers with North Vietnam’s lead negotiator, Le Duc Tho, right, in suburban Paris on Nov 23, 1972. A peace agreement was signed on Jan. 27, about four weeks after Linebacker II ended on Dec. 29. (AP Photo/Michel Lipchitz)

AP Photo/Michel Lipchitz