Red Alert

For the first time since the U.S. terror threat levels were created, the level has been raised to Code Red or Severe, but only for flights originating in the United Kingdom bound for the United States. I heard a commentator on a news channel report that Heathrow Airport in London as the world's busiest but that's not the case - Hartsfield-Jackson Atlanta International Airport is the world's busiest. Heathrow is actually the third busiest. Take a look at my list of the world's busiest airports.