With the breakdown of peace negotiations with Hanoi, President Nixon launched Operation Linebacker II, an extensive aerial campaign that began on 16 December 1972. Nixon, in an effort to conceal the breakdown of talks, ordered that the public explanation for the bombing be linked to "a possible enemy offensive in the South." With no information flowing from the White House, the Pentagon, or MACV, North Vietnam's propaganda was all that correspondents had to go on and it was extensively reported by the media. The American people, however, were unconvinced. According to a Harris poll, fewer than 50 percent agreed that it was "inhuman and immoral for the U.S. to have bombed Hanoi's civilian center" and 71 percent believed "what we did in bombing Hanoi was no worse than what the communists have done in the Vietnam War." Following the campaign, Hanoi returned to the negotiating table and (after some wrangling with the Saigon government) the Paris Peace Accords were signed on 27 January 1973. For the United States, the Vietnam War was over.