• In this Wednesday June 13, 1973 file photo, President Nixon's National Security Adviser Henry A. Kissinger, left, and Le Duc Tho, member of Hanoi's Politburo, are shown outside a suburban house at Gif Sur Yvette in Paris after negotiation session. Founder of the Nobel Prize Alfred Nobel gave only vague instructions on how to select winners, leaving wide room for interpretation by the prize committees in Stockholm and Oslo. In 1973 U.S. Secretary of State Henry Kissinger and North Vietnamese leader Le Duc Tho were honored for their efforts to achieve a cease-fire in the Vietnam War in what’s become one of the most contentious awards in Nobel history. The Vietnamese leader refused to accept the award, Kissinger asked the U.S. ambassador to Norway to accept it for him, and the war dragged on for three more years. The prize was heavily criticized, particularly by those who opposed the Vietnam War and associated Kissinger with it. (AP Photo/Michel Lipchitz, file)

    Controversial Nobel Prize winners

    STOCKHOLM (AP) — It’s just a prize, right? Maybe so, but the Nobel Prizes have a way of sparking ferocious debate about whether the winners were worthy or whether the judges’ decisions were politically biased.