article_snippet: The last of five Cuban intelligence agents returned to Cuba in December following a prisoner swap that also freed U.S. State Department contractor Alan Gross, who was jailed in Cuba.
article_snippet: a prisoner swap that also freed U.S. State Department contractor Alan Gross, who was jailed in Cuba coincided with an announcement of a change in U.S. policy toward Cuba.
article_snippet: Seven other agents agreed to cooperate with U.S. prosecutors, but five of Seven other agents refused to switch sides.
article_snippet: Agents Rene Gonzalez, 58, and Fernandez Gonzalez, 51, returned to Cuba in 2014 after serving Agents Rene Gonzalez, 58, and Fernandez Gonzalez, 51 prison sentences.
article_snippet: Seven other agents were transferred to Cuba a part of a prisoner swap after serving 16 years in U.S. prisons.
highlights_snippet: five Cuban intelligence agents were jailed in the United States for many years .