1932 – Charles G. King, University of Pittsburgh isolates Vitamin C, using adrenal samples provided by Hungarian Albert Szent-Györgyi
1945 – The Holocaust: US forces liberate the Ohrdruf concentration camp in Germany, the first such camp to be liberated by the US Army
1959 – Mali Federation founded, consisting of Senegal and French Sudan (dissolved 1960)
1972 – First electric power plant fueled by garbage begins operating
1988 – Largest crowd (55,438) at an MLB Opening Day game at Cincinnati’s Riverfront Stadium; Reds win over St. Louis Cardinals, 5-4 in 12 innings
1992 – 146th Grand National: 14/1 shot Party Politics, ridden by Welsh jockey Carl Llewellyn wins by 2½ lengths from Romany King
1994 – Netscape Communications founded as Mosaic Communications
1997 – Second Defense Meteorological Satellite Program weather satellite is launched aboard a Titan II rocket