Hugo Chavez hasn't been seen in public for weeks, reportedly due to mysterious health issues he developed while traveling, forcing him to undergo emergency surgery in Havana, Cuba. This week, his absence led to the postponement of a summit of Latin American leaders that was scheduled to take place next week. Chavez was expected to host the summit, on the 200th anniversary from Venezeula's independence from Spain. The last photo of Chavez was released on Tuesday, and showed him in Cuba chatting with former leader Fidel Castro.   The BBC's Sarah Grainger joins us from Caracas, the capital of Venezuela.      

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