This file photo dated 1968 shows former US President George Bush, then a US Congressman from Houston, as he pins bars on his son George W. Bush, representing his entry as 2nd Lieutenant into the Texas Air National Guard. US President George W. Bush on 10 February 2004, sought to quiet an election-year controversy by releasing pay and service records that aides said proved he met his military duties at the height of the Vietnam War. “These records verify that he met the requirements necessary to fulfill his duties,” Bush spokesman Scott McClellan told reporters at a televised briefing, repeatedly waving the documents for emphasis.     AFP PHOTO

President Bush jokes with FBI graduate T.A. Staderman II, who received the physical training award, Thursday, Oct. 30, 2008, during a graduation ceremony for FBI Special Agents in Quantico, Va. (AP Photo/Charles Dharapak)

Pope John Paul II and President Bush talk during their first meeting at the Pontiff’s summer residence in Castel Gandolfo near Rome Monday, July 23, 2001. Bush is in Italy for a two-day state visit.  The Pope urged President Bush to bar the creation of human embryos for research, saying Monday that America has a moral responsibility to reject actions that “devalue and violate human life.” (AP Photo/Paolo Cocco, POOL)

President George W. Bush reacts to a Turkey named “Liberty” at the annual turkey pardoning event at the White House, three days ahead of Thanksgiving, November 19, 2001. The fortunate bird will spend the rest of his days on a farm in Virginia. With the president are turkey industry representatives Jeff Radford (L) and Stuart Proctor.   REUTERS/Kevin Lamarque

President Bush tries to catch a pen tossed to him by an aide to autograph the mailbox of volunteer Andy Kinyon, background, as Bush visits Hurricane Katrina rebuilding efforts in Biloxi, Miss. Thursday, April 27, 2006.  (AP Photo/Gerald Herbert)Andy Kinyon

President Bush waves as he departs TSTC Airport in Waco, Texas Sunday, May 23, 2004, on his way to New Haven, Conn., for graduation celebrations for his daughter Barbara Bush, who is graduating from Yale University. Scrapes and bruises can be seen on the President’s face from a fall he sustained while mountain biking on his Crawford ranch yesterday afternoon.  (AP Photo/Gerald Herbert)

U.S. President George W. Bush hands back a crying baby that was handed to him from the crowd as he arrived for an outdoor dinner with German Chancellor Angela Merkel in Trinwillershagen, Germany, July 13, 2006.  REUTERS/Jim Bourg  (GERMANY) BEST QUALITY AVAILABLE

U.S. President George W. Bush (L) jokingly prepares to blow out all the candles on his birthday cake, presented to him by Denmark’s Queen Margrethe (R) at the Fredensborg Palace in Fredensborg, Denmark, July 6, 2005. Bush spent his 59th birthday around the Danish capital Copenhagen before preparing to fly later in the day to Scotland for the G8 Summit. REUTERS/Jason Reed

President Bush does his best to salute while holding his dog Barney as they get off of Air Force One at Andrews Air Force Base, Md., Monday, June 25, 2001. Bush spent the afternoon in Detroit for the annual U.S. Conference of Mayors where he called on the mayors support for more faith-based initiatives. (AP Photo/Susan Walsh)

President Bush stands with Saudi Prince Salman, right, brother of Saudi King Abdullah, while watching a traditional sword dance at the Al Murabba Palace and Natural History Museum in Al Janadriyah, Saudi Arabia, Tuesday, Jan. 15, 2008.  (AP Photo/Susan Walsh)

President Bush gestures to his dog Spot on the South Lawn of the White House, Monday, Sept 23, 2002, as he returned from a day trip to Trenton N.J..  Bush made the trip to attend a fund-raiser for Republican U.S. Senate candidate Douglas Forrester.. (AP Photo/Ron Edmonds)

US President George W. Bush (R) chats with Chinese President Hu Jintao (C) and Russian President Vladimir Putin (C) at the end of the Asian-Pacific leaders meeting in Hanoi, 19 November 2006.  All 21 Asia-Pacific leaders wore dresses. But only the three women, pretty in pink, had the sartorial nerve to don the hats. Each year, the summit of the Asia-Pacific Economic Cooperation (APEC) forum provides world leaders with an opportunity to strut their stuff in the traditional garb of the host country for the so-called “family photo”.  AFP PHOTO / JAPAN POOL / KENICHI MURAKAMI

U.S. President George W. Bush looks up after starting the engine on a Harley-Davidson motorcycle while touring  Harley Davidson Vehicle Operations in York, Pennsylvania, August 16, 2006. At right applauding Bush is Harley-Davidson President and CEO Jim Ziemer. REUTERS/Kevin Lamarque  (UNITED STATES)

In this combination photo, President Bush reacts as he stumbles while walking off Air Force One after returning to Andrews Air Force Base, Md., Monday, July 31, 2006. (AP Photos/Haraz N. Ghanbari)

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RNPS PICTURES OF THE YEAR – U.S. President George W. Bush casts a baitfish as he goes fishing with his father, former U.S. President George Bush (not pictured), off the coast of Kennebunkport, Maine, June 29, 2007.   REUTERS/Jason Reed (UNITED STATES)

U.S. President George W. Bush smiles at the White House Correspondents Association Dinner in Washington April 21, 2007. REUTERS/Yuri Gripas (UNITED STATES)

President Bush, right, jokingly holds his wind-blown umbrella upright as he walks towards Air Force One during a rainstorm Tuesday, June 1, 2004, at Andrews Air Force Base outside Washington. Man at left is United States Air Force Deputy Wing Commander Col. John R. Ranck, Jr. (AP Photo/Charles Dharapak)

President Bush, left, reacts as Freedom Corps volunteer Eloise Monsarrat struggles to put another lei on Bush shortly after his arrival at Hickam Air Force Base in Honolulu, Hawaii, Monday, Nov. 20, 2006.  (AP Photo/Charles Dharapak)

President Bush and graduate Theodore Shiveley from Plano, Texas, bump chests at the United States Air Force Academy graduation ceremony in Colorado Springs, Colo., Wednesday, May 28, 2008. (AP Photo/Charles Dharapak)