1812: Earthquake causes fluvial tsunami in Mississippi: the most violent of a series of earthquakes near Missouri causes a so-called fluvial tsunami in the Mississippi River, actually making the river run backward for several hours. The series of tremors, which took place between December 1811 and March 1812, were the most powerful in the history of the United States. More Here
1984: First human satellite: While in orbit 170 miles above Earth, Navy Captain Bruce McCandless becomes the first human being to fly untethered in space when he exits the U.S. space shuttle Challenger and maneuvers freely, using a bulky white rocket pack of his own design. McCandless orbited Earth in tangent with the shuttle at speeds greater than 17,500 miles per hour and flew up to 320 feet away from the Challenger. After an hour and a half testing and flying the jet-powered backpack and admiring Earth, McCandless safely reentered the shuttle. More Here
1990: Soviet Communist Party gives up monopoly on political power: The Central Committee of the Soviet Union’s Communist Party agrees to endorse President Mikhail Gorbachev’s recommendation that the party give up its 70-year long monopoly of political power. The Committee’s decision to allow political challenges to the party’s dominance in Russia was yet another signal of the impending collapse of the Soviet system. More Here
