Delta Air Lines flew 178,698 cargo ton miles in February, a year-over-year decrease of 3.5 percent. So far in 2013, the carrier has seen 353,822 tons of air freight activity, putting its two-month total 1.5-percent behind its results over the same period in 2012. Even with these numbers, Delta Cargo officials are hopeful for a turnaround. Last month, Delta Cargo head Tony Charaf expressed optimism about 2013’s cargo activity. Speaking at the Air Cargo Netherlands conf...