In this photo released by Miraflores Press Office, Venezuela's President Hugo Chavez , left, speaks beside his Vice-President Nicolas during a televised speech form his office at Miraflores Presidential palace in Caracas, Venezuela, Saturday, Dec. 8, 2012. Chavez announced Saturday night that his cancer has returned and that he will undergo another surgery in Cuba. Chavez, who won re-election on Oct. 7, also said for the first time that if his health were to worsen, his successor would be Vice President Nicolas Maduro.