NATION

A service dog strolls through the isle inside a United Airlines plane at Newark Liberty International Airport while taking part in a training exercise in Newark, N.J. The Transportation Department issued a final rule Wednesday, covering service animals. The rule says only dogs can qualify, and they have to be specially trained to help a person with disabilities. For years, some travelers have been bringing untrained dogs and all kinds of other animals on board by claiming they need the animal for emotional support.