US Secretary of State Hillary Clinton looks on as former Secretary of State George Shultz is given the Honorary Order of Australia by Australian Foreign Minister Kevin Rudd during the Australia-United States Ministerial Consultations in San Francisco, California on September 14, 2011. Reuters
US president-elect Richard Nixon stands with his newly named Secretary of Labour George P Shultz after announcing his cabinet appointment, in Washington, DC, on December 11, 1968. Getty Images
George Shultz works with Ronald Reagan during a flight from Wilkes-Barre to Pittsburgh in October, 1980, when he was serving as a senior adviser to the Republican presidential candidate. Getty Images
Secretary of State designate George Shultz, right, speaks with members of the Senate Foreign Relations Committee on Capitol Hill in Washington on July 13, 1982. From left are senators Joseph Biden, Charles Percy and Edward Zorinsky. AP
Secretary of State George Shultz walks between President Ronald Reagan and Vice President George Bush at the White House on January 9, 1985 after two days of arms talks with the Soviet Union in Geneva. AP
US Secretary of State George Shultz is greeted by Italian Defence Minister Giovanni Spadolini at the latter's office in Rome on March 29, 1986. Reuters
Margaret Thatcher shakes hands with US Secretary of State George Shultz at No 10 Downing Street, where he briefed the British prime minister on the Washington arms summit, in December 1987. Reuters
Egyptian President Hosni Mubarak and US Secretary of State George Shultz embrace in Cairo October 19, 1989 before starting talks on Middle East peace moves and the Gulf War. Reuters
George Shultz, former US First Lady Nancy Reagan and Senator Daniel Patrick Moynihan listen to speakers during dedication ceremonies of the new Ronald Reagan Building and International Trade Centre in Washington on May 5, 1998. AFP
George Shultz and California Governor Arnold Schwarzenegger listen during the opening of the 26th Border Governors Conference in Los Angeles on August 14, 2008. AP
US President Barack Obama listens as former George Shultz speaks in the Oval Office of the White House on May 19, 2009. Reuters
George Shultz speaks at University of California Davis in Sacramento during the Governors' Global Climate Summit 3: Building the Green Economy, on November 15, 2010. AP
George Shultz and his wife Charlotte arrive at the White House for a state dinner hosted by President Barack Obama and first lady Michelle Obama for Chinese President Hu Jintao on January 19, 2011. Reuters
US Secretary of State Hillary Clinton looks on as former Secretary of State George Shultz is given the Honorary Order of Australia by Australian Foreign Minister Kevin Rudd during the Australia-United States Ministerial Consultations in San Francisco, California on September 14, 2011. Reuters
US president-elect Richard Nixon stands with his newly named Secretary of Labour George P Shultz after announcing his cabinet appointment, in Washington, DC, on December 11, 1968. Getty Images
George Shultz works with Ronald Reagan during a flight from Wilkes-Barre to Pittsburgh in October, 1980, when he was serving as a senior adviser to the Republican presidential candidate. Getty Images
Secretary of State designate George Shultz, right, speaks with members of the Senate Foreign Relations Committee on Capitol Hill in Washington on July 13, 1982. From left are senators Joseph Biden, Charles Percy and Edward Zorinsky. AP
Secretary of State George Shultz walks between President Ronald Reagan and Vice President George Bush at the White House on January 9, 1985 after two days of arms talks with the Soviet Union in Geneva. AP
US Secretary of State George Shultz is greeted by Italian Defence Minister Giovanni Spadolini at the latter's office in Rome on March 29, 1986. Reuters
Margaret Thatcher shakes hands with US Secretary of State George Shultz at No 10 Downing Street, where he briefed the British prime minister on the Washington arms summit, in December 1987. Reuters
Egyptian President Hosni Mubarak and US Secretary of State George Shultz embrace in Cairo October 19, 1989 before starting talks on Middle East peace moves and the Gulf War. Reuters
George Shultz, former US First Lady Nancy Reagan and Senator Daniel Patrick Moynihan listen to speakers during dedication ceremonies of the new Ronald Reagan Building and International Trade Centre in Washington on May 5, 1998. AFP
George Shultz and California Governor Arnold Schwarzenegger listen during the opening of the 26th Border Governors Conference in Los Angeles on August 14, 2008. AP
US President Barack Obama listens as former George Shultz speaks in the Oval Office of the White House on May 19, 2009. Reuters
George Shultz speaks at University of California Davis in Sacramento during the Governors' Global Climate Summit 3: Building the Green Economy, on November 15, 2010. AP
George Shultz and his wife Charlotte arrive at the White House for a state dinner hosted by President Barack Obama and first lady Michelle Obama for Chinese President Hu Jintao on January 19, 2011. Reuters
US Secretary of State Hillary Clinton looks on as former Secretary of State George Shultz is given the Honorary Order of Australia by Australian Foreign Minister Kevin Rudd during the Australia-United States Ministerial Consultations in San Francisco, California on September 14, 2011. Reuters