In this Wednesday Feb. 13, 2013 photo, Curt Viebranz, the president of George Washington’s historic Mount Vernon estate, stands outside what will be a climate controlled book vault inside the ... more 
In this Wednesday Feb. 13, 2013 photo, Curt Viebranz, the president of George Washington’s historic Mount Vernon estate, stands outside what will be a climate controlled book vault inside the under-construction George Washington Library, at Mount Vernon, Va. (AP Photo/Jacquelyn Martin) less 
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Associated Press | Photo By Jacquelyn Martin
Fri, Feb 15, 2013 4:45 AM EST