Transcript for Drones cause 2-day shutdown at London's Gatwick Airport
Now to new developments in that crisis at a major international airport. This morning the search is still on for whoever flew drones outside gatwick airport shutting it down for a day and leading to 760 flight cancellations affecting 100,000 passengers. James Longman with the latest. Reporter: Some flights are taking off and landing once again. That sea of red on the departure board has eased. But despite the first signs of relief the terminal remains a hectic maze of long lines and frupgs just days before Christmas. We are still here. Security is closed. Visiting foolly and friends in Denver and I don't know if we'll get to see them. Reporter: At the peak of holiday travel a mysterious drone buzzing over the airfield at London's gatwick airport forced them to halt all flights in and out. You have hundreds of thousands of passengers that were supposed to travel. Reporter: Passengers stranded in the terminal, some for over 36 hours while outside helicopters circled above and police armed with long rifles hunted for the mystery pilot. They're authorizing the military to step in. The activity is illegal and can face up to five years in prison. They've been spotted 50 times in the last 48 hours. What a drone could do to a moving plane. Overnight authorities were weighing a new tactical option, shoot down the drone. There's a number of factors involved, both the range of the weapon we might choose to use and also how obviously how high the drone is. Reporter: James joins us now. Any theory on who is behind all of this? Well, Amy, one line of inquiry is a possible environmental activist, they staged protests the uk airports, there's been hard lessons learned about how vulnerable airports can be to drones. Back here at home new developments on that missing
This transcript has been automatically generated and may not be 100% accurate.