18 août 2017 - IFALPA has been made aware of recurring drone issues affecting operations at Stockholm-Arlanda (ESSA/ARN) to the extent that the airport had to be closed on several occasions. On the 7th of August, Stockholm-Arlanda was closed for about an hour due to drones being flown within the airport’s Control Zone. Two Maydays were declared and several aircraft were diverted. On the 15th of August, the airport was closed again with a Mayday call and diversions.