CARACAS, VENEZUELA - MAY 8: An opposition activist hurls back at riot police a tear gas canister during clashes ensuing a protest against President Nicolas Maduro, in Caracas, Venezuela on May 8, 2017. Venezuela's opposition mobilized Monday in fresh street protests against President Nicolas Maduro's efforts to reform the constitution in a political crisis. Supporters of the opposition Democratic Unity Roundtable (MUD) gathered in eastern Caracas to march to the education ministry. (Photo by Carlos Becerra/Anadolu Agency/Getty Images)
