AP US History This Day in American History October – Flames spark in the Chicago barn of Patrick and Catherine O'Leary, igniting a two-day blaze that kills between 200 and 300 people, destroys 17,450 buildings, leaves 100,000 homeless and causes an estimated $200 million (in 1871 dollars; $3 billion in 2007 dollars) in damages.

AP US History This Day in American History October – The first transcontinental air race in the United States begins, with 63 planes competing in the round-trip aerial derby between California and New York. As 15 planes departed the Presidio in San Francisco, California, 48 planes left Roosevelt Field on Long Island, New York.

AP US History This Day in American History October It was on October 8, 1957, that bible-school dropout Jerry Lee Lewis laid down the definitive version of "Great Balls Of Fire," amidst a losing battle with his conscience and with the legendary Sam Phillips, head of Sun Records.

AP US History This Day in American History October – The U.S. House of Representatives votes to proceed toward impeaching President Bill Clinton on charges of perjury and obstruction of justice. By December 1998, the Republican-led House had gathered enough information from an investigation committee to vote in favor of impeachment, which in turn sent the case to the Senate.