A passenger boarded a United flight from Rome to San Francisco. He asked for food. The flight attendant refused. The two exchanged words. Eventually, another flight attendant heard the argument and brought the passenger some crackers. The passenger ate the crackers, took his seat, and went to sleep.

While the passenger slept, the flight attendant

Domestic travelers can hold the airline liable only if their injuries are caused by the airline’s negligence. But if the passenger is traveling internationally, then treaties called the Montreal and Warsaw Conventions apply. Under the Conventions, whether the airline was negligent is for the most part irrelevant. An airline is responsible only if the