Article Photos: Chavez opponents demand answers about his cancer



  A protester shows a fake bill that reads in Spanish "This is the revolution. Poor Bolivar" with the value of 100 crossed out and 54 written next to it, at an opposition demonstration against of the devaluation of the currency in Caracas, Venezuela, Saturday, Feb. 23, 2013. Venezuela's government announced on Friday, Feb. 8 that it is devaluing the country's currency, a long-anticipated change expected to push up prices in the heavily import-reliant economy. Venezuela's government has had strict currency exchange controls since 2003 and maintains a fixed, government-set exchange rate. While those controls have restricted the amounts of dollars available at the official rate, an illegal black market has flourished and the value of the bolivar has recently been eroding. (AP Photo/Ariana Cubillos)

A protester shows a fake bill that reads in Spanish "This is the revolution. Poor Bolivar" with the value of 100 crossed out and 54 written next to it, at an opposition demonstration against of the devaluation of the currency in Caracas, Venezuela, Saturday, Feb. 23, 2013. Venezuela's government announced on Friday, Feb. 8 that it is devaluing the country's currency, a long-anticipated change expected to push up prices in the heavily import-reliant economy. Venezuela's government has had strict currency exchange controls since 2003 and maintains a fixed, government-set exchange rate. While those controls have restricted the amounts of dollars available at the official rate, an illegal black market has flourished and the value of the bolivar has recently been eroding. (AP Photo/Ariana Cubillos)