1. Barack H. Obama is sworn in as the 44th president of the United States as his wife Michelle Obama holds the Bible and their daughters Malia Obama and Sasha Obama look on, on the West Front of the Capitol January 20, 2009 in Washington, DC. (Chuck Kennedy-Pool/Getty Images) ##

2. U.S. president George W. Bush and Commander of the United States Forces Korea Walter Sharp attend at the Yongsan garrison on August 5, 2008 in Sungnam, South Korea.

3. 15 September 2001: President Bush's war cabinet at Camp David. Clockwise from left: US attorney general John Ashcroft, vice-president Cheney, Bush, secretary of state Powell, secretary of defence Rumsfeld, and deputy secretary of defence Paul Wolfowitz, FBI director Robert Mueller, secretary of treasury Paul O'Neill, CIA director George Tenet, chief of staff Card, national security adviser Condoleezza Rice, and chairman of the Joint Chiefs of Staff General Henry Shelton

4. President Reagan working on the State of the Union Address at his oval office desk. 1/26/82.

5. 16 April 2004: British prime minister Blair, left, and President Bush walk down the Colonnade at the White House following the conclusion of their joint news conference in the Rose Garden of the White House On April 27, 2009 President Obama spoke at the 146th Annual Meeting of National Academy of Sciences.

6. President George W. Bush, joined by Mrs. Laura Bush, stands outside Air Force One as he addresses his remarks in honor of Veterans Day, Tuesday, Nov. 11, 2008

7. Former Presidents with current President Barrack Obama, Left to right: George H. W. Bush, Barack Obama, George W. Bush, Bill Clinton, and Jimmy Carter.

8. President Ford and Queen Elizabeth dance during the state dinner in honor of the Queen and Prince Philip at the White House - July 17, 1976. President Bill Clinton and FEMA Director Lames Lee Witt tour the destruction after a tornado hits Alabama, 1998.