Production crews put the finishing touches on the stage before the dedication ceremony of the George W. Bush Presidential Center, Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former president George W. Bush, right, speaks with his father former president George H.W. Bush during the dedication of the George W. Bush Presidential Center Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former President George H.W. Bush arrives during the dedication of the George W. Bush Presidential Center, Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former president Jimmy Carter and his wife, former first lady Rosalynn Carter arrive for the dedication of the George W. Bush Presidential Center, Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former president Jimmy Carter speaks during the dedication of the George W. Bush Presidential Center Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former president George W. Bush, left, shakes hands with former president William J. Clinton during the dedication of the George W. Bush Presidential Center Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former president George W. Bush, left, shakes hands with former president William J. Clinton during the dedication of the George W. Bush Presidential Center Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former President George W. Bush, accompanied by his wife former first lady Laura Bush, flashes the "W" sign after his speech during the dedication of the George W. Bush Presidential Center, Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
Former President George W. Bush, center, shares a laugh with his wife, former first lady Laura Bush, and father, former President George H.W. Bush, during the dedication of the George W. Bush Presidential Center, Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)
