People pray during a demonstration in support of Venezuela's President Hugo Chavez 

People pray during a demonstration in support of Venezuela's President Hugo Chavez at the Simon Bolivar square in Caracas, Venezuela, Sunday Dec. 9, 2012. Chavez was heading back to Cuba on Sunday for more cancer surgery after announcing that the illness returned despite two previous operations, chemotherapy and radiation treatment.  Chavez said Saturday that if there are "circumstances that prevent me from exercising the presidency further" Vice-President Nicolas Maduro should replace him for the remainder of his term. (AP Photo/Fernando Llano)
Associated Press
People pray during a demonstration in support of Venezuela's President Hugo Chavez at the Simon Bolivar square in Caracas, Venezuela, Sunday Dec. 9, 2012. Chavez was heading back to Cuba on Sunday for more cancer surgery after announcing that the illness returned despite two previous operations, chemotherapy and radiation treatment. Chavez said Saturday that if there are "circumstances that prevent me from exercising the presidency further" Vice-President Nicolas Maduro should replace him for the remainder of his term. (AP Photo/Fernando Llano)
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