PS: I suspect this move is tied up with geopolitics, with the resurgent Russians announcing they were reopening a base to listen in on American communications just as NSA does theirs. Opening up ties to Cuba, lifting the embargo, heads the Russians off at the pass.
Whatever the reason, the oppressive sanctions regime needed to be lifted 50 Years ago. It is a black mark on US foreign policy, done for the sole reason of punishing a country that refused to follow orders. The CIA terror campaign on the island, Operation Mongoose, was started under JFK, who was a Cold Warrior when elected. As he changed in the wake of the Bay of Pigs and the missile crisis, Mongoose was turned inward. Lee Harvey Oswald, from appearances (we will never know), was being groomed to be a patsy in the murder of Castro. He became the patsy in the JFK murder.
Even if they are doing this for all the wrong reasons, some people who deserve a break are getting a break. Halleluhia. Marry Christmas, Cuba!