In August 1961, during an economic conference of the Organization of American States in Punta del Este, Uruguay, Che Guevara sent a note of "gratitude" to United States President John F. Kennedy through Richard N. Goodwin, Deputy Assistant Secretary of State for Inter-American Affairs.
Pada Agustus 1961, selama konferensi ekonomi Organisasi Bangsa-Bangsa Amerika di Punta del Este, Uruguay, Che Guevara mengirimkan surat yang mengungkapkan "rasa terima kasih" kepada Presiden Amerika Serikat John F. Kennedy melalui Richard N. Goodwin, Deputi Asisten Sekretaris Negara untuk Urusan Antar-Amerika.