Former president George W. Bush, left, and former first lady Laura Bush enter for the lighting of Freedom Hall at the George W. Bush Presidential Center Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

Associated Press
Former president George W. Bush, left, and former first lady Laura Bush enter for the lighting of Freedom Hall at the George W. Bush Presidential Center Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former president George W. Bush, left, and former first lady Laura Bush enter for the lighting of Freedom Hall at the George W. Bush Presidential Center Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
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