Tough measures at airports around the world

Airports are adding passenger screenings and taking other precautions to prevent a new virus from being spread by Chinese tourists going abroad for the Lunar New Year holidays.China has imposed an unprecedented, open-ended shutdown of Wuhan, the city of 11 million people where the virus first appeared last month. And it began similar measures in nearby cities Friday to try to halt the spread of the newly identified coronavirus that has infected hundreds.