Cuban spies behind sale of American secrets around the world / Former US ambassador, Cuban spy blames decision to betray country on Yale's radical politics in 60s, 70s / US diplomat turned Cuban spy jailed for 15 years / Cuba spy scandal reveals US vulnerabilities / Former US diplomat admits spying for Cuban intelligence for decades / Former career US diplomat admits secretly spying for Cuban intelligence for decades / Cuban spies have a particular talent for getting people to spill secrets. That's a problem for Washington / A former senior U.S. diplomat who served in U.S. embassies across Latin America was accused of spying for Cuba's intelligence service for decades in one of the highest-reaching and longest-lasting security breaches of the federal government. / US assessing impact of ex-diplomat charged as Cuban spy / Former career U.S. diplomat charged with secretly spying for Cuban intelligence for decades