WHAT HAPPENED IN 1967.
Look what happened the 1967.

At Groote Schuur Hospital in Cape Town, South Africa, a transplant team headed by Christiaan Barnard carries out the first heart transplant on a human (53-year-old Louis Washkansky). (3. December 1967)

Vietnam War: U.S. and South Vietnamese forces engage Viet Cong troops in the Mekong Delta. (4. December 1967)

Adrian Kantrowitz performs the first human heart transplant in the United States. (6. December 1967)

Constantine II of Greece attempts an unsuccessful counter-coup against the Regime of the Colonels. (13. December 1967)

The Silver Bridge over the Ohio River collapses, killing 46 people. (15. December 1967)

Australian Prime Minister Harold Holt disappears while swimming near Portsea, Victoria, and is presumed drowned. (17. December 1967)

Harold Holt, the Prime Minister of Australia, is officially presumed dead. (19. December 1967)

A Pennsylvania Railroad Budd Metroliner exceeds 155 mph on their New York Division, also present day Amtrak's Northeast Corridor. (20. December 1967)

Louis Washkansky, the first man to undergo a heart transplant, dies in Cape Town, South Africa, having lived for 18 days after the transplant. (21. December 1967)

The Youth International Party, popularly known as the "Yippies", is founded. (31. December 1967)