Cuban Espionage: The Best?
Unfortunately, there has been no shortage of turncoats within the ranks of US intelligence officers over the years. Most go for money, a few are simpatico with an opposing ideology, a few even think they're doing the right thing because our Uncle is not.
The common thread: most of them start off as loyal officers.
The Cubans, for all the short shrift most (mostly uninformed) give them in other areas, have an excellent record of getting their agents early and working them long term. I'm not aware of any Cuban agents who didn't show up on the job on day-one already turned.
Open up to Cuba? Maybe if it included having their instructors school our recruiters, because its clear where the true expertise is.