Shares of Delta Air Lines (NYSE: DAL) plunged more than 5% in early trading on Tuesday before clawing their way back to about a 2.6% loss at the close, as the company reported Q2 earnings. Rivals United Airlines Holdings was almost even on the day, and American Airlines Group was down only a fraction of 1%, but neither company reported earnings. Good news first: Delta is making headway in extinguishing cash burn that approached $100 million a day in the early days of the pandemic.