In Miami, two Cuban-Americans have been arrested on charges they spied in the United States for the Cuban government. Carlos and Elsa Alvarez, both of whom work at Florida International University, were jailed without bail on charges they conducted espionage for nearly 30 years. No evidence has emerged the couple spied on the US government. Government sources say the couple’s activities focused on Cuban exile groups who have worked to overthrow the government of Cuban President Fidel Castro. The Alvarezes will appear in federal court a week from today. Their attorneys indicated they will plead not guilty.