CARACAS, VENEZUELA - MARCH 04:  Protesters sling stones at Venezuelan national guard troops during an anti-government demonstration on March 4, 2014 in Caracas, Venezuela. Wednesday marks the first anniversary of Hugo Chavez' death on March 5, 2013. For three weeks protesters have blocked roads throughout the country and clashed with security forces of the government of Chavez' chosen successor President Nicolas Maduro.  (Photo by John Moore/Getty Images)