I was doing some research about 9/11 and I stumbled into something interesting unintentionally. I noticed that the flight loads for all four hijacked airplanes were less than 100 pax. The loads ranged from 30-100 and some of these aircraft were wide body flying trans con flights. I guess my question here is how did the airlines stay in business back then (Pre-9/11) flying loads so light and now that they’re back to flying similar loads they’re in a bankruptcy panic? Any ideas or insight?