The interesting part, when you look at the cargo "lift" capacity (below deck) of a merged DAL and NWA, it is considerably larger than FedEx or UPS; I would be a bit nervous too. It was long ago said that the cargo in the belly of AA's widebodies paid the costs on each flight, I haven't been over to AMR lately, but I Imagine AA Cargo is still a sizeable portion of their income.