You’ve seen those humorous T-shirts reading: ¨There are 10 types of people in the world—those who understand binary and those who don’t.” That also applies to travelers: They either love or hate red-eye flights. In case you’re from a different planet and don’t already know, a red-eye is a long-haul flight that operates overnight on which you’re supposed to get your night’s sleep. If you love them, you can find at least a few on many long-haul nonstop routes of—say—five or more hours duration. And even if you hate them, you can’t avoid them on many busy long hauls….