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FILE - In this May 31, 2012 file photo, former President George H.W. Bush, left, and his wife, former first lady Barbara Bush, arrive in the East Room of the White House in Washington, for a ceremony to unveil the official portrait of their son former President George W. Bush. Bush and his wife Barbara won't be attending the Republican National Convention next month in Tampa because of health reasons. (AP Photo/Pablo Martinez Monsivais)

Associated Press
FILE - In this May 31, 2012 file photo, former President George H.W. Bush, left, and his wife, former first lady Barbara Bush, arrive in the East Room of the White House in Washington, for a ceremony to unveil the official portrait of their son former President George W. Bush. Bush and his wife Barbara won't be attending the Republican National Convention next month in Tampa because of health reasons.  (AP Photo/Pablo Martinez Monsivais)
FILE - In this May 31, 2012 file photo, former President George H.W. Bush, left, and his wife, former first lady Barbara Bush, arrive in the East Room of the White House in Washington, for a ceremony to unveil the official portrait of their son former President George W. Bush. Bush and his wife Barbara won't be attending the Republican National Convention next month in Tampa because of health reasons. (AP Photo/Pablo Martinez Monsivais)
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