U.S. stock futures were mixed this morning, with the Dow futures gaining around 0.1% on Tuesday.Shares of Firefly Aerospace Inc. FLY fell sharply in pre-market trading following second-quarter results.The company posted a second-quarter loss of $5.78 per share, versus a year-ago loss of$4.60 per share. Its sales declined to $15.549 million from$21.071 million.Firefly Aerospace shares dipped 12.5% to $43.29 in the pre-market trading session.Here are some other stocks moving lower in pre-market trading.Digi ...