“17.07.63 Secretary of State Dean Rusk said that Greek vessels continued to pose ‘the hardest problem’. Even though the United States had been pressuring Greece for some time and ‘found a cooperative Greek government’, the Greek attempt to deal informally with this problem was not successful, in part due to that fact that the freighters had been chartered to socialist countries before the problem arose.” [Pro Embargo]
“John F. Kennedy (D). Timeline,” Cuba versus Blockade: Cuban People’s website, 2007