FILE - In this Nov. 11, 2014, file photo, former President George H.W. Bush acknowledges the crowd at his presidential library before his son former President George W. Bush discusses his new book "41: A Portrait of My Father" in College Station, Texas. Former President George H.W. Bush has fallen at home Wednesday, July 15, 2015, in Kennebunkport, Maine, and broken a bone in his neck. (AP Photo/Texas Tribune, Bob Daemmrich, Pool, File)
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