Do you ever wonder why it's so expensive to eat at an airport? We don't mean the food you're served while on a plane (if you get any food at all, which is definitely an iffy thing in these cost-sensitive times for airlines) but all that sumptuous fare you can avail yourself of while waiting for your flight to begin boarding or while you're between connecting flights. For sure, at large or medium-sized airports the chances are good that the array of dining opportunities will range from what's considered fast food (and therefore, supposedly inexpensive) all the way up to...