Venezuelan President in Charge Nicolas Maduro delivers a speech during the official registration of his candidacy for the upcoming presidential election at the National Electoral Council (SNE) in Caracas, on March 11, 2013. Venezuela has entered a bitter election race to succeed Hugo Chavez, with his chosen successor branding his challenger a "fascist" after the opposition candidate accused him of exploiting the late leader's death.TOPSHOTS/AFP PHOTO/Ronaldo Schemidt