CARACAS, Venezuela (Reuters) - Russia will help Venezuela build plants to make Kalashnikov rifles and ammunition after the United States restricted arms sales to the South American nation, President Hugo Chavez said on Tuesday. Chavez also told a press conference in Quito, Ecuador, that a delivery of 30,000 Kalashnikov automatic rifles was due to arrive from Russia in early June. "The Russians are going to install a Kalashnikov rifle plant and a munitions factory. So we can defend every street, every hill, every corner," he said in remarks broadcast in Venezuela. Washington banned all weapons sales to Chavez's leftist government...