Recently, I discussed the police helicopter that flies at night. I first noticed the helicopter in the Spring of 2012.
Earpiece recently provided more information. There is a large mall in the area– Arundel Mills. The flights I first noticed are mainly because the mall is closing at that time of the evening and they insure everything is okay in the area.
There is a lot of traffic in our housing area– on our street. More than just the folks who live here. Also some of the homes have government personnel. Sometimes they sample the tags coming through the area.
The area is heavily surveilled– you may have noticed.
FYI: Maryland Live the casino adjacent to the mall is open 24 hours a day. It opened in June 2012. The helicopter flights coincide with the mall closing times– however I first noticed them as the casino was about to open.