Former United States president George H. W. Bush, right, leaves the field with the help of Pierce Bush, his grandson, before the Texas Bowl NCAA college football game in 2009 in Houston. Dave Einsel/ASSOCIATED PRESS hide caption
George H.W. Bush
George P. Bush gives a eulogy during the funeral service for his grandfather, former President George H.W. Bush, at St. Martins Episcopal Church in Houston on Thursday. David J. Phillip/Pool/Getty Images hide caption
A portrait of former President George H.W. Bush and his family in front of their Kennebunkport, Maine, home in 1986. Newsmakers/Getty Images hide caption
George Bush wades through a crowd in Houston after his victory speech in the 1988 presidential election. Mike Spague/AFP/Getty Images hide caption
ACT UP demonstrators shout and carry posters outside the 1992 Republican National Convention. Gregory Smith/Corbis/Getty Images hide caption
Former President George H.W. Bush's service dog lies in front of his casket in Houston on Sunday. The 41st president died Friday at the age of 94. Evan Sisley/Office of George H.W. Bush/AP hide caption
Flowers sit at the base of a statue of former President George H.W. Bush outside his presidential library and museum on Saturday, in College Station, Texas. Bush will be laid to rest at his family plot near the library on Thursday. David J. Phillip/AP hide caption
Former President George H.W. Bush crosses his colorfully socked feet during the unveiling ceremony of portraits of his son former President George W. Bush and former first lady Laura Bush, in 2012. Carolyn Kaster/AP hide caption
Former Presidents Jimmy Carter, George H.W. Bush, Barack Obama, George W. Bush and Bill Clinton came together last year in College Station, Texas. Rick Kern/Getty Images for Ford Motor Co. hide caption
In this May 20 photo provided by the office of George H.W. Bush, the former president waves to supporters as his motorcade arrives in Kennebunkport, Maine. A Bush spokesman said the nation's 41st president was eager to get to Maine after enduring his wife's death and then being hospitalized shortly after that with a blood infection. Evan Sisley/AP hide caption
First lady Barbara Bush, with her pet dog Millie, talks to reporters in September 1990 in Washington, D.C. Mrs. Bush said Iraq cannot be allowed to get away with its occupation of Kuwait. She also revealed that Millie has a case of lupus but "she's in complete remission." Charles Tasnadi/AP hide caption
Former Presidents Bill Clinton (left) and George Bush discuss their lives as current and former presidents at a leadership event at the George W. Bush Presidential Center in Dallas on Thursday. Tony Gutierrez/AP hide caption
In 2003, reporters listen to the then-newly released 240 hours of Nixon White House recorded conversations at the National Archives in College Park, Md. Joyce Naltchayan/AFP/Getty Images hide caption
Former President George H.W. Bush tosses the coin as his wife, Barbara, watches at the start of February's Super Bowl game between the Atlanta Falcons and the New England Patriots in Houston. David J. Phillip/AP hide caption
Former President George W. Bush (above); his father, former President George H.W. Bush; and brother Jeb Bush, who ran for president this year, will not be attending this week's Republican National Convention in Cleveland. Matt Rourke/AP hide caption
U.S. Libertarian Party presidential candidate Gary Johnson speaks to AFP in Washington, D.C., on May 9. AFP/Getty Images hide caption
Liberty, a 45-pound turkey, is seen at the White House before being pardoned in 2011. The bird died two years later due to heart failure. Pablo Martinez Monsivais/AP hide caption
Former President George H.W. Bush pumps his fist next to his son, Jeb, during a fundraiser in Tampa, Fla., in 1994. Jeb Bush was running for governor. He lost that year, but won four years later. Chris O'Meara/AP hide caption
Former Vice President Dick Cheney is introduced during the dedication of the George W. Bush Presidential Center in 2013. David J. Phillip/AP hide caption
The statues of George Washington, Thomas Jefferson, Teddy Roosevelt and Abraham Lincoln at Mount Rushmore in South Dakota. AP hide caption
Former President George W. Bush (right) and his father, former President George H.W. Bush, wave as they leave a family wedding in Washington, D.C., in May 2006. Normand Blouin-Pool/Getty Images hide caption
Accepting the 2014 John F. Kennedy Profile in Courage Award on behalf of her grandfather former President George H.W. Bush, Lauren Bush Lauren, center, and fellow Award recipient Paul W. Bridges, the former mayor of Uvalda, Ga., right, hold the awards as they stand with Jack Schlossberg, left, grandson of President John F. Kennedy. Gretchen Ertl/AP hide caption