The controller can be heard in the audio, which the outlet said was shared by a reader, saying security forces are handling the situation and tells the flight that the base’s class D airspace ...

Smaller towered airports generally fall under Class D airspace. These airspaces are marked with dashed blue lines, usually have a 4-5 nm radius, and comprise a single layer that typically extends ...

The controller tells the pilot that “security forces are handling the situation” and that the base’s class D airspace – typically the area surrounding an airport up to an altitude of 2,500 ...

With all this news about drones, don't expect sightings within D.C. limits. Why it matters: The airspace around D.C. is "more restricted than in any other part of the country," per the FAA.