Loading...Loading...U.S. stock futures were lower this morning, with the Dow futures falling over 50 points on Thursday.Shares of Delta Air Lines, Inc. DAL fell sharply in today's pre-market trading after the company posted downbeat second-quarter earnings and issued lower-than-expected third-quarter earnings outlook.Delta Air Lines reported quarterly earnings of $2.36 per share which missed the analyst consensus estimate of $2.37 per share. The company reported quarterly sales of $16.658 billion which beat ...