In Buenos Aires, where the care and feeding of the psyche is a major industry, the doctor is in at the city's Jorge Newbery airport. Poder Volar— "Able to Fly" in Spanish — opened last month and seeks to calm nervous fliers with classes, individual therapy or, if need be, medication.

Psychiatrist Claudio Plá, who believes this is the world's only airport-based psychiatric practice, had been treating fearful fliers for 11 years before he hung out his shingle in Terminal A just days before what authorities say was a terrorist plot at London's Heathrow threw airports into a renewed tizzy. Business for the doctor and his staff of two retired pilots and a therapist has been good, he says. Patients pay $70 an hour for therapy or $200 for an eight-hour class.