Certainly McCain could not have been unaware of the havoc unleashed by his bombing missions over Vietnam. Though Pentagon war planners and Defense Secretary Robert McNamara preferred to emphasize the antiseptic nature of aerial bombardment against carefully chosen targets, a highly publicized series of articles in late 1966 by Harrison Salisbury in the New York Times described the widespread devastation of civilian neighborhoods around Hanoi by American bombs. "Bomb damage...extends over an area of probably a mile or so on both sides of the highway" near one target, he wrote, noting that "small villages and hamlets along the route [were] almost obliterated." Several years ago, a chastened McNamara acknowledged that Operation Rolling Thunder, which unloaded 800 tons of bombs a day over North Vietnam, caused more than a million deaths and injuries in Vietnam each year of the three years it was in operation.