“21.12.61 The Kennedy Administration, in an effort to reinforced the embargo on Cuba, banned exports by certain U.S. companies or individuals for 90 days. The Department of Commerce required American producers and suppliers traditionally involved in trade with Cuba to ask their clients about the end users of purchased products, and advise the Agency of ‘doubtful transactions.’ [Pro Embargo]
“John F. Kennedy (D). Timeline,” Cuba versus Blockade: Cuban People’s website, 2007