The UK's Gatwick airport has reopened to some flights, despite drones that caused it to shut down not having been located yet.
The airport says significant delays and disruption are likely to continue.
Flights were grounded on Wednesday and Thursday after drone sightings over the airfield.
The device and its operator have not been found by authorities.
UK correspondent Olly Barratt says some flights are now moving.
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UK correspondent Olly Barratt says if the drone, or drones, reappear, they could be shot down.
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