The bullhorn President George W. Bush used at ground zero in the wake of the Sept. 11, 2001 terrorist attacks is seen during a tour of the George W. Bush Presidential Center Wednesday, April 24, 2013,... more 
The bullhorn President George W. Bush used at ground zero in the wake of the Sept. 11, 2001 terrorist attacks is seen 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 president’s policy institute. It opens to the public on May 1. (AP Photo/David J. Phillip) less 
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Associated Press | Photo By David J. Phillip
Wed, Apr 24, 2013 2:27 PM EDT