FILE - In this May 14, 2004 file photo, Venezuela's President Hugo Chavez gives a press conference at the presidential palace in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Leslie Mazoch, File)

FILE - In this April 13, 2010 file photo, members of the National Revolutionary Militia, also called Bolivarian militias, hold up their guns and a painting of Venezuela's President Hugo Chavez at an event marking the 9th anniversary of Chavez's return to power after a failed 2002 coup, in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Ariana Cubillos, File)

FILE - In this Nov. 13, 2006 file photo, Brazil's President Luiz Inacio Lula da Silva, right, and Venezuela's President Hugo Chavez greet people during the inauguration ceremony of an oil drill in Campo Morichal, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Fernando Llano, File)

FILE - In this Jan. 23, 2002 file photo, Venezuela's President Hugo Chavez waves to supporters during a government march commemorating the anniversary of Venezuelan democracy in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Fernando Llano, File)

FILE - In this Dec. 5, 2001 file photo, Venezuela's President Hugo Chavez gestures before a painting of Venezuelan independence hero Simon Bolivar at an event at Miraflores presidential palace in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Leslie Mazoch, File)

In this Oct. 28, 2000 photo released by Miraflores Press Office, Venezuela's President Hugo Chavez, right, speak with Cuba's Fidel Castro during a friendly baseball game in Barquisimeto, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Miraflores Press Office)

FILE - In this Nov. 24, 2004 file photo, Venezuela's President Hugo Chavez talks at a ceremony where he was awarded the "Gadhafi International Human Rights Prize 2004" in Tripoli, Libya. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Yousef Al-Ageli, File)

In this July 22, 2006 photo released by Miraflores Press Office, Venezuela's President Hugo Chavez , right, speak with Cuba's Fidel Castro during their visit to the home of Cuban revolutionary Ernesto "Che" Guevara in Cordoba, Argentina. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Miraflores Press Office)

FILE - In this Feb. 4, 1999 file photo, Venezuela's newly sworn in President Hugo Chavez salutes the crowd next to his wife Marisabel Chavez during a military parade commemorating the seventh anniversary of his failed 1992 coup in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Douglas Engle, File)

FILE - In this July 24, 2000 file photo, Venezuela's President Hugo Chavez holds Simon Bolivar's sword at an event celebrating the independence hero's 114th birthday in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Andres Leighton, File)

FILE - In this Aug. 11, 2000 file photo, Venezuela's President Hugo Chavez, front right, walks with Iraqi's President Saddam Hussein at Saddam airport in Baghdad, Iraq. Chavez, the first national leader to visit Iraq since the Gulf War in 1991, was leaving the country after a short visit as part of a tour of OPEC countries. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/INA, Pool, File)

FILE - In this Nov. 19, 2005 file photo, Venezuela's President Hugo Chavez wears a Mexican sombrero as he sings a Mexican ranchera song at a rally in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Fernando Llano, File)

In this undated photo released by Miraflores Press Office, Hugo Chavez poses as he serves time in the Yare II prison near Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Miraflores Press Office)

FILE - In this July 15, 2001 file photo, Venezuela's President Hugo Chavez, center, his wife Marisabel with their daughter Rosa Ines watch a parade on Children's Day in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Ivan Gonzalez, File)

FILE - In this June 2, 2011 file photo, Venezuela's President Hugo Chavez, left, holds a crutch as he welcomes Brazil's former President Luiz Inacio Lula da Silva, not in picture, at Miraflores presidential palace in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Ariana Cubillos, File)

FILE - In this Oct. 9, 2012 file photo, backdropped by a portrait of independence hero Simon Bolivar, Venezuela's President Hugo Chavez talks during a press conference at the Miraflores palace in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Rodrigo Abd, File)

FILE - In this Feb. 4, 1997 file photo, Hugo Chavez, a retired army lieutenant colonel who led a coup attempt in 1992, waves to people gathered in Caracas Square to celebrate the fifth anniversary of the failed coup in Caracas, Venezuela. The coup attempt sent shock waves through Latin America, since oil-rich Venezuela is one of the region's oldest democracies and for years was considered a model for Third World economic development. The girl is unidentified. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Jose Caruci, File)

FILE - In this April 14, 2002 file photo, Venezuela's President Hugo Chavez gestures to supporters as he arrives to Miraflores presidential palace after being freed by his military captors two days after the military announced he had resigned, in Caracas, Venezuela. Venezuela's Vice President Nicolas Maduro announced on Tuesday, March 5, 2013 that Chavez has died. Chavez, 58, was first diagnosed with cancer in June 2011. (AP Photo/Dario Lopez-Mills, File)