An anti-government protester holds a placard that reads, "Not censorship. Freedom of speech" during a rally against Venezuela's President Nicolas Maduro government in Caracas March 2, 2014. Venezuela has been rocked by its worst unrest in a decade, with at least 17 people killed in violence around opposition demonstrations and clashes between hooded protesters, security forces, and pro-government militants. REUTERS/Tomas Bravo (VENEZUELA - Tags: POLITICS CIVIL UNREST)