Former President George W. Bush looks toward President Barack Obama as he arrives for the dedication of the George W. Bush Presidential Center, Thursday, April 25, 2013, in Dallas. (AP

 

              Former President George W. Bush looks toward President Barack Obama as he arrives for the dedication of the George W. Bush Presidential Center, Thursday, April 25, 2013, in Dallas. (AP
Former President George W. Bush looks toward President Barack Obama as he arrives for the dedication of the George W. Bush Presidential Center, Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)