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Venezuela's President Hugo Chavez, center, greets supporters during a caravan from Miraflores government palace to Simon Bolivar airport in Caracas, Venezuela, Friday, Feb. 24, 2012. Venezuelan President Hugo Chavez is on his way to Cuba to have a tumor removed from the same region of the pelvis where he had cancer surgery last year. (AP Photo/Fernando Llano)

Venezuelan leader returning to Cuba for treatment

The 57-year-old leftist president, in office since 1999, has vowed to overcome cancer to win another six-year term in the Oct. 7 election.