Originally Posted by TSASCRNR
Sorry I am not aware of this during my day to day routine.
I literally stay 10 feet away from the jetliner and see NO cargo other than luggage being loaded in the belly of the airliner.
Possibly other airlines in different airports do this? In our airport we strictly have PASSENGER and we have CARGO airliners. No in between.
Like others have said, you must work at a very small, underserved airport:
American Airlines offers Cargo service on virtually every flight we operate. With more than 800 aircraft and over 4,200 daily departures, we provide one of the most comprehensive cargo networks in the industry.
http://www.aa.com/content/businessPrograms/cargo.jhtml
http://www.aacargo.com/
American stopped flying cargo-only planes nearly 20 years ago yet last year AA's cargo total was over 2 billion cargo ton miles for $558 million of revenue. All other airlines are similar. In fact, of the legacy airlines, only NW still operates cargo-exclusive aircraft. The others fly cargo in the bellies of the passenger aircraft.
I'm not sure you're looking for it. It might be right under your nose. But then again, since it isn't being screened, of course you might ignore it, and rightfully so.