‘Multiple waves’ of unauthorized drones recently spotted over strategic US Air Force base

A drone sighting that temporarily raised alarms at one of the United States Air Force’s largest and most strategic airfields earlier this month was more extensive, and potentially more dangerous, than first reported, according to a confidential internal briefing document reviewed by ABC News.

Barksdale Air Force Base in Louisiana said it was under a shelter-in-place order March 9 after “a report of an unmanned aerial system operating over the installation.”

The sighting raised concerns because Barksdale houses long-range B-52 bombers and plays a critical role in command and control of the Air Force nuclear defense capabilities.

The shelter-in-place order was lifted later that day but the unauthorized drone flights continued for nearly a week.

Read more: ABC News