Today is Tuesday, Aug. 20, the 232nd day of 2019. There are 133 days left in the year. Today’s Highlight in History: On August 20, 1986, postal employee Patrick Henry Sher-rill went on a deadly rampage at a post office in Edmond, Okla., shooting 14 fellow workers to death before killing himself. On this date: In 1862, the New York Tribune published an open letter by editor Horace Greeley…