DALLAS, TX – APRIL 25: Former U.S. President George W. Bush (2nd R) shakes hands with his father former President George H.W. Bush (2nd L) as they attend the opening ceremony of the George W. Bush Presidential Center with his wife, former first lady Laura Bush (R), and his mother, former first lady Barbara Bush (L), April 25, 2013 in Dallas, Texas. The Bush library, which is located on the campus of Southern Methodist University, with more than 70 million pages of paper records, 43,000 artifacts, 200 million emails and four million digital photographs, will be opened to the public on May 1, 2013. The library is the 13th presidential library in the National Archives and Records Administration system. (Photo by Alex Wong/Getty Images)