Article Photos: Aides: Chavez in tough fight, may miss swearing-in 5/5

In this photo released by Miraflores Press Office, Venezuela's Vice President Nicolas Maduro, center, addresses the nation on live television flanked by Oil Minister Rafael Ramirez, left, and National Assembly President Diosdado Cabello at the Miraflores presidential palace in Caracas, Venezuela, Wednesday, Dec. 12, 2012.  Maduro said that Venezuela's President Hugo Chavez will face a "complex and hard" process after undergoing his fourth cancer-related operation in Cuba on Tuesday. Over the weekend, Chavez named Maduro as his chosen political heir. (AP Photo/Miraflores Press Office, Efrain Gonzalez)