"Snakes on a Plane" may be the hot horror movie of the summer, but bees on planes are creating the most buzz in some aviation circles. Africanized honey bees -- the infamous "killer bees" -- are increasingly making unscheduled layovers at airports across the Southwest. The aggressive bees, which entered the U.S. from Mexico in the early 1990s, like to travel across open spaces and stop to rest whenever the queen gets tired. Airports have few trees or other natural rest stops. That makes planes, jetways, baggage-loading equipment, terminals and parking garages popular for stopovers. Consequently, pilots and mechanics sometimes...