1854: Slavery opponents met in Ripon, WI, to call for creation of a new political group, which became the Republican Party. 1893: Carborundum was patented by Edward Acheson. 1901: Nobel Prize laureate Linus Pauling, who who applied quantum mechanics to the study of molecular structures, was born. 1911: Thomas A. Edison, Inc. was organized. 1935: Nylon was discovered by researchers at DuPont. 1939: The word "dord" was inadvertently created via a misprint in the Merriam Webster dictionary, being ascribed the definition "density." 1956: Jay Forrester awarded patent for iron core memory. 1983: The final episode of M*A*S*H aired with a record 125 million viewers. 1993: BATF agents raided the Branch Dividian church in Waco, TX, which culminated in the burning deaths of 79 people, including 25 children. 1995: Denver International Airport (DIA) opened after 16 months of delays and $3.2 billion in budget overruns.