VENEZUELA-US-MADURO-DEL MONACO-EXPULSION

Two men ride past a mural portraying the Venezuelan flag, President Hugo Chavez and South American liberator Simon Bolivar at the 23 de Enero neighbourhood, in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. Venezuelan Vice-President Nicolas Maduro expelled US Air Force Embassy attache David Del Monaco, giving him 24 hours to leave the country, accusing him of conspiracy. AFP PHOTO/Geraldo Caso (GERALDO CASO/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH-OPPOSITION-STUDENTS-DEMO

Women students hold a demonstration in front of the Government Ministry in Caracas on March 04, 2013. Opposition protesters demand that the government reveal more about the health of cancer-stricken President Hugo Chavez. AFP PHOTO/JUAN BARRETO (JUAN BARRETO/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH

Supporters of Venezuelan President Hugo Chavez cry during prayers at the chapel inside the Military Hospital in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. AFP PHOTO / Leo RAMIREZ (Photo credit should read LEO RAMIREZ/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH

Supporters of Venezuelan President Hugo Chavez pray at the chapel inside the Military Hospital in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. AFP PHOTO / Leo RAMIREZ (Photo credit should read LEO RAMIREZ/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH

Supporters of Venezuelan President Hugo Chavez pray at the chapel inside the Military Hospital in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. AFP PHOTO / Leo RAMIREZ (Photo credit should read LEO RAMIREZ/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH

People walk past a poster portraying Venezuelan President Hugo Chavez near the Military Hospital in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. The poster reads, "Chavez lives and smiles". AFP PHOTO / Leo RAMIREZ (LEO RAMIREZ/AFP/Getty Images)

VENEZUELA-CHAVEZ-STUDENTS-DEMO

Students hold a protest blocking an avenue demanding the truth regarding the conditions of Venezuelan President Hugo Chavez in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. AFP PHOTO /JUAN BARRETO (JUAN BARRETO/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH

A woman is seen near a newspaper portraying Venezuelan President Hugo Chavez in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. AFP PHOTO /JUAN BARRETO (JUAN BARRETO/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH

Supporters of Venezuelan President Hugo Chavez are seen outside of the Military Hospital in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. AFP PHOTO / Leo RAMIREZ (LEO RAMIREZ/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH-SUPPORTERS

A supporter of Venezuelan President Hugo Chavez writes him a letter outside of the Military Hospital in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. AFP PHOTO/Geraldo Caso (GERALDO CASO/AFP/Getty Images)

VENEZUELA-CHAVEZ-HEALTH-SUPPORTERS

Followers of Venezuelan President Hugo Chavez write supporting letters outside of the Military Hospital where he is confined, in Caracas on March 5, 2013. Venezuela plunged deeper into an uncertain future on Tuesday as cancer-stricken President Hugo Chavez took a turn for the worse, hit by a severe infection and breathing problems. AFP PHOTO/Geraldo Caso (GERALDO CASO/AFP/Getty Images)