Bush revisits legacy during library fete

** FILE ** President Obama shares a laugh with former first lady Barbara Bush at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, April 25, 2013. (AP Photo/Charles Dharapak)

** FILE ** President Obama shares a laugh with former first lady Barbara Bush at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, April 25, 2013. (AP Photo/Charles Dharapak)

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