CARACAS, Venezuela - Venezuelan President Hugo Chavez called the U.S. government an "immoral empire" and repeated accusations of spying Friday, threatening to arrest any American officials caught gathering intelligence on his military. Chavez's warning came hours after his vice president, Jose Vicente Rangel, accused officials at the U.S. Embassy of involvement in a spying case involving several Venezuelan naval officers who allegedly passed sensitive information to the Pentagon. Chavez focused his speech to thousands of activists on summoning a global "battle" to resist what he termed U.S. imperialism. The frequent and vocal critic of U.S. global policy used especially harsh...