Five foreign ministers signed the Bangkok Declaration in Thailand, founding the Association of Southeast Asian Nations to promote regional stability and economic cooperation.

Bolivian authorities and international media confirmed and widely circulated news of revolutionary Che Guevara's execution, cementing his transformation into a global martyr symbol.

Fidel Castro led a mass memorial in Havana's Plaza de la Revolución for Che Guevara, executed in Bolivia days earlier, cementing his revolutionary legend.

The Soviet probe Venera 4 became the first spacecraft to transmit data directly from the atmosphere of another planet, descending into Venus's crushing clouds.

Egyptian missile boats sank the Israeli destroyer INS Eilat off Sinai using Soviet-made Styx missiles, the first successful sinking of a warship by anti-ship missiles.

British forces begin their final evacuation from Aden after 128 years of colonial rule, ending amid an insurgency that made the port one of the era's bloodiest anti-colonial fights.

NASA launched Apollo 4, the first uncrewed test flight of the massive Saturn V rocket, proving the vehicle that would ultimately carry astronauts to the Moon.

Surgeon Christiaan Barnard performed the world's first human-to-human heart transplant in Cape Town, giving Louis Washkansky a new lease on life.