People participate in a vigil for Venezuela's President Hugo Chavez in La Paz, Bolivia, Monday Dec. 10, 2012. Chavez's cancer relapse and his sudden announcement that he will undergo a fourth cancer-related surgery in Cuba have thrown Venezuela's future into question. (AP Photo/Juan Karita)

Associated Press
People participate in a vigil for Venezuela's President Hugo Chavez in La Paz, Bolivia, Monday Dec. 10, 2012. Chavez's cancer relapse and his sudden announcement that he will undergo a fourth cancer-related surgery in Cuba have thrown Venezuela's future into question. (AP Photo/Juan Karita)
People participate in a vigil for Venezuela's President Hugo Chavez in La Paz, Bolivia, Monday Dec. 10, 2012. Chavez's cancer relapse and his sudden announcement that he will undergo a fourth cancer-related surgery in Cuba have thrown Venezuela's future into question. (AP Photo/Juan Karita)
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