's use of the aircraft, was regular cargo loaded on the aircraft? Perhaps as a "premium" rush service to JFK
. Generally cargo is loaded on pallets or containers (with the exception of aircraft which are strictly bulk-load only (ie. 737). Would regularly booked cargo fly Concorde or was it all transported on the non-supersonic flights? Judging by most cargo I've seen, it consists of large quantities which are already pre-palleted or in containers from or to be loaded onto other flights.