11 of 14: Former President George H. W. Bush, right, is helped by his son former President George W. Bush, left, to his seat at the Kennedy Center, Monday, March 21, 2011, before the "All Together Now - A Celebration of Service" performance in honor of former President George H. W. Bush. (AP Photo/Carolyn Kaster) (AP Photo/ Carolyn Kaster)

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