>> London's Gatwick Airport is offering a $63,000 reward for information about the drones that shut down one of Europe's busiest travel hubs for 36 hours. That's if there were any drones to begin with. British police say they acknowledge that the incident may have been a false alarm. Two people arrested on Friday have been released without charge.
>> I am satisfied that there are no longer suspects in this investigation. And they have, it's fair to say to their credit, they have cooperated with us throughout.>> But police still have 67 reports of drone sightings to go on, and a crashed drone found near the airport.
So it's still all up in the air. 140,000 holiday season travelers had their flights cancelled or diverted last week over the scare. Because of safety concerns, even a small drone can cause serious damage if it collides with the wrong part of a plane. Every time the airport tried to reopen the runways, more reports of drones came in.
Police called it a deliberate act of sabotage. Flights only resumed after the British army was deployed to safeguard the perimeter.