Britain announces that Soviet space scientist Anatoli Fedoseyev has been granted asylum.
Friday, June 20, 1969
The Cuyahoga River fire helps spur an avalanche of water pollution control activities resulting in the Clean Water Act, Great Lakes Water Quality Agreement and the creation of the federal Environmental Protection Agency
The U.S. Congress recesses for the remainder of 1948, after an overtime session closes at 7:00 a.m. D.C. time (to be shortly interrupted by Truman's recall from Congressional recess for July 20, 1948).
Wednesday, June 20, 1928
Puniša Račić shoots 3 opposition representatives in the Yugoslavian Parliament, and injures 3 others.
Wednesday, June 20, 1900
Boxer Rebellion: Boxers gather about 20,000 people near Peking and kill hundreds of European citizens, including the German ambassador.
Compromise of 1790: Thomas Jefferson, James Madison, and Alexander Hamilton come to an agreement: Madison agrees to not be strenuous in opposition for the assumption of state debts by the federal government Hamilton agrees to support the capital site being above the Potomac.
Battle of Châlons: Attila avoids a pitched battle near Orléans and withdraws to the Catalaunian Plains (Chagne-Ardenne). The Roman coalition defeat the Huns, but Theodoric I is killed in the encounter. This is the last military victory of the Western Roman Empire.