Ross Perot, right, looks on as his wife Margot, left, signs a beam during a ceremony at a construction site of Perot Museum of Nature and Science, Thursday, March 10, 2011, in Dallas. The billionaire ... more 
Ross Perot, right, looks on as his wife Margot, left, signs a beam during a ceremony at a construction site of Perot Museum of Nature and Science, Thursday, March 10, 2011, in Dallas. The billionaire former presidential candidate Perot and his family attended a ceremony to celebrate the placement of the final beam in the construction of the museum near downtown Dallas. less 
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Associated Press | Photo By Tony Gutierrez
Fri, Mar 11, 2011 1:16 AM EST