DALLAS, TX - APRIL 25: Former first lady and former Secretary of State Hillary Rodham Clinton speaks with her husband former president Bill Clinton as they 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)
