Statues of former Presidents George W. Bush (L) and his father George H.W. Bush are on display during a tour of the George W. Bush Presidential Center on the campus of Southern Methodist University 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.