Tens of thousands of people have marched through the Venezuelan capital, Caracas, in rival demonstrations for and against President Hugo Chavez. Opponents held a rally against what they called the president’s growing authoritarianism. They were concerned about an education law they fear could lead to socialist indoctrination in schools. Meanwhile, one government minister told Chavez supporters that 29 more radio stations would be closed, reports said. The radio closures are part of a continuing campaign against what the government considers to be right-wing media, with 34 stations already closed down.