DALLAS, TX – APRIL 25: (L-R) First lady Michelle Obama, U.S. President Barack Obama, former first lady Barbara Bush, former President George H.W. Bush, former first lady Laura Bush, former President George W. Bush, former President Bill Clinton, former first lady Hillary Clinton, former President Jimmy Carter and former first lady Rosalynn Carter attend the opening ceremony of the George W. Bush Presidential Center 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 Kevork Djansezian/Getty Images)