Crackdown on passengers who get unruly on international flights starts Jan. 1

Passengers who make trouble on international flights beware.

An amendment to a global treaty will soon make it easier for countries to prosecute passengers on international flights who cause disruptions, delays or threaten the safety of the flight by tussling with other passengers or flight attendants.

Incidents involving unruly passengers had become less frequent but the offenses had become more serious, according to a study by an international airline trade