Cargo ops used to make money - but these days, not so much.

Other cargo airlines are having trouble too - it's not just NWA Cargo. Kalitta Air has reduced their aircraft (and crews) by 40%, Cathay Pacific Cargo is flying a lot less, and other companies have gone under.

I wish Delta could turn it around, but it seems unlikely. Belly Freight on the B744s or B777 will probably carry some of what was carried before.