Which year did Che Guevara address the United Nations General Assembly as head of the Cuban delegation?

Ernesto "Che" Guevara (14 June 1928 – 9 October 1967) was an Argentine Marxist revolutionary, physician, author, guerrilla leader, diplomat, and military theorist. A major figure of the Cuban Revolution, his stylized visage has become a ubiquitous countercultural symbol of rebellion and global insignia in popular culture

In December 1964, Che Guevara had emerged as a "revolutionary statesman of world stature" and thus traveled to New York City as head of the Cuban delegation to speak at the United Nations. On 11 December 1964, during Guevara's hour-long, impassioned address at the UN, he criticized the United Nations' inability to confront the "brutal policy of apartheid" in South Africa, asking "Can the United Nations do nothing to stop this?"