Looking back: Sept. 17

Today is Monday, Sept. 17, the 260th day of 2018. There are 105 days left in the year.Today’s highlight in history:On Sept. 17, 1787, the Constitution of the United States was completed and signed by a majority of delegates attending the Constitutional Convention in Philadelphia.On this date:1862: More than 3,600 men were killed in the Civil War Battle of Antietam in Maryland.1920: The American Professional Football Association — a precursor of the National Football League — wa