President Obama and former first lady Laura Bush (right) shake hands as first lady Michelle Obama looks on during the groundbreaking ceremony for the Smithsonian Institution's National Museum of African American History and Culture in Washington on Wednesday, Feb. 22, 2012. (AP Photo/Susan Walsh)

Photo by: Susan Walsh

President Obama and former first lady Laura Bush (right) shake hands as first lady Michelle Obama looks on during the groundbreaking ceremony for the Smithsonian Institution's National Museum of African American History and Culture in Washington on Wednesday, Feb. 22, 2012. (AP Photo/Susan Walsh)