From left, former first lady Barbara Bush, President George H.W. Bush and former president George W. Bush hold hands during the invocation during the dedication of the George W. Bush Pr

 

              From left, former first lady Barbara Bush, President George H.W. Bush and former president George W. Bush hold hands during the invocation during the dedication of the George W. Bush Pr
From left, former first lady Barbara Bush, President George H.W. Bush and former president George W. Bush hold hands during the invocation during the dedication of the George W. Bush Presidential Center Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)