In this Oct. 26, 1972 file photo, then presidential adviser Dr. Henry Kissinger tells a White House news conference that "peace is at hand in Vietnam. (AP Photo)

Former Secretary of State Henry Kissinger signs autographs after a discussion with former Secretaries of State at the taping of CNN's "The Next President: A World of Challenges", Monday, Sept. 15, 2008, at George Washington University in Washington. (AP Photo/Charles Dharapak)

Former Secretaries of State Henry Kissinger, left, and Madeleine Albright are pictured in Washington, before a discussion with former Secretaries of State at the taping of CNN's "The Next President: A World of Challenges", Monday, Sept. 15,2008, at George Washington University in Washington. (AP Photo/Charles Dharapak)

Former Secretary of State Henry Kissinger arrives for a discussion with former Secretaries of State at the taping of CNN's "The Next President: A World of Challenges", Monday, Sept. 15, 2008, at George Washington University in Washington. (AP Photo/Charles Dharapak)

Former Secretary of States Henry Kissinger, left, Madeleine Albright, second from left, along with current Secretary of State Condoleezza Rice, second from right, and former Defense Secretary Frank Carlucci, right, listen as President Bush speaks during a ceremonial groundbreaking ceremony for the United States Institute of Peace at Navy Hill, Thursday, June 5, 2008, in Washington. (AP Photo/Ron Edmonds)