Venezuela's streets were quieter than usual on Friday during an opposition-called strike, but participation was patchy after the socialist government threatened to shut down businesses that closed. Venezuela's opposition Democratic Unity coalition called for a 12-hour shutdown as part of escalating protests after authorities scuttled its push for a referendum to recall the OPEC nation's unpopular socialist leader. The government vowed to take over any companies heeding the strike, sending inspectors to ensure they were open. "I support the opposition, but I don't agree with this strike," said Eduardo Martinez, 51, unemployed, standing near a bakery line in eastern Caracas. As well as Friday's strike, the opposition is carrying out a political trial of Maduro in the National Assembly and is vowing to march to the Miraflores presidential palace next week.