Airports employing insecticide, Pitot tube covers to deter keyhole wasp nests
                                
                                
                                    (Newser) -
                                    There are numerous examples of birds colliding with planes in incidents that prove deadly for human passengers, hence why airports use various methods to deter fowl. Now, several airports are working to deter a smaller, airborne pest that also proves a deadly threat: wasps. As the  Wall Street Journal  reports,...