CaptionThe day of the invasion by Warsaw Pact troops under Soviet orders. Soviet Union feared that Prime Minister Alexander Dubcek's democratic reforms during the Prague Spring, threatened the balance of power in Eastern Europe. Dozens of people were killed and several members of the Czechoslovakian leadership were arrested.
CaptionDr Christian Barnard checks on his patient, dentist Philip Blaiberg, after the second ever successful human heart transplant. The first operation was also conducted by Barnard. Blaiberg's transplant gained additional media attention because the donor was a black South African.