CARACAS, VENEZUELA - APRIL 10: Venezuelan opposition activists throwing back a tear gas canister during clashes with the police in Caracas, Venezuela on April 10, 2017. The center-right opposition vowed fresh street protests -after earlier unrest left dozens of people injured - to increase pressure on Maduro, whom they blame for the country's economic crisis. (Photo by Carlos Becerra/Anadolu Agency/Getty Images)