On this day in 1971, the Soviet space program's Mars 2 orbiter released a descent module and became the first man-made object to reach the surface of Mars.
On this day in 1978, San Francisco city mayor George Moscone and openly gay city supervisor Harvey Milk were assassinated by former supervisor Dan White.
On this day in 1991, the United Nations Security Council adopted Security Council Resolution 721, leading the way to the establishment of peacekeeping operations inYugoslavia.
On this day in 2005, the first partial human face transplant is completed in Amiens, France.