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DALLAS, TX - APRIL 24: A display on the Bush administration's education reform is seen at the George W. Bush Presidential Center on the campus of Southern Methodist University i seen on April 24, 2013 in Dallas, Texas. Dedication of the George W. Bush Presidential Library is to take place on April 25 with all five living U.S. Presidents in attendance and an expected 8,000 invitation-only guests. (Photo by Kevork Djansezian/Getty Images)

DALLAS, TX - APRIL 24:  A display on the Bush administration's education reform is seen at the George W. Bush Presidential Center on the campus of Southern Methodist University i seen on April 24, 2013 in Dallas, Texas. Dedication of the George W. Bush Presidential Library is to take place on April 25 with all five living U.S. Presidents in attendance and an expected 8,000 invitation-only guests.  (Photo by Kevork Djansezian/Getty Images)