A sudden power outage brought the world's busiest airport to a standstill on Sunday, grounding more than 1,000 flights in Atlanta just days before the start of the Christmas travel rush.

The city that boasts the world’s tallest building is now home to the world’s busiest airport for international passengers too.

US customs and health officials have begun taking the temperatures of passengers arriving at New York’s Kennedy International Airport from three West African countries in a stepped-up screening effort meant to prevent the spread of the Ebola virus.