On this day in history - September 10th

Simón Bolívar was named President of Peru (1823)

Mickey Mantle hit baseball's longest home run an estimated 643 feet (1960)

Guinea-Bissau gained independence from Portugal (1974)

Hungary reversed East German visa restrictions and opened its borders, beginning a flood of emigration that led to the fall of the Berlin Wall two months later (1989)

Switzerland became the 190th member of the United Nations (2002)

And on this day in 1963, 20 black students entered public schools in Alabama, following a standoff between federal authorities and Gov. George C. Wallace, who resisted integration.