Docent Patricia Flynn demonstrates an interactive with information about conflicts in Afghanistan and Iraq during a tour of the George W. Bush Presidential Center Wednesday, April 24, 2013, in Dallas. More than 8,000 people are expected to attend the invitation-only dedication of the center, Thursday, April 25, which will house the presidential library and museum along with the 43rd presidentís policy institute. It opens to the public on May 1.  (AP Photo/David J. Phillip)

Photo by: David J. Phillip

Docent Patricia Flynn demonstrates an interactive with information about conflicts in Afghanistan and Iraq during a tour of the George W. Bush Presidential Center Wednesday, April 24, 2013, in Dallas. More than 8,000 people are expected to attend the invitation-only dedication of the center, Thursday, April 25, which will house the presidential library and museum along with the 43rd presidentís policy institute. It opens to the public on May 1. (AP Photo/David J. Phillip)