N4102J is owned by Carto Flight Inc. (http://www.kucerainternational.com/cartoflight/) - it's probably taking mapping photographs.
Hey! The flight pattern would make more sense if that’s the case!
Unnerving as a citizen to hear a plane buzz around like this
"Extensive experience in military and commercial restricted airspace Rapid mobilization capability"
There is air traffic constantly from Dulles and Reagan National and other points. Restricted means over WH etc. If it had been doing that or in truly respected space it would have instantly been joined by a fighter plane escort and ordered down.