FILE - In this Nov. 30, 2012 file photo,  Venezuela's Vice-President Nicolas Maduro exits  a staging area after an official group photo during a UNASUR meeting  in Lima, Peru.  Venezuelan President Hugo Chavez announced on television Saturday is heading back to Cuba on Sunday Dec. 9, 2012 for more surgery for cancer. Chavez acknowledged the seriousness of his situation saying for the first time that if he suffers complications Vice-President Nicolas Maduro should take his place as Venezuela's leader and continue his socialist movement. (AP Photo/Martin Mejia, File)
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