[Scan-DC] Aircraft

[lee_robert at cox.net]

I'm a bit of a lurker on this list, but will contribute what little I can to the low flying aircraft item.  Having been evacuated from my building in Crystal City, I was standing on Crystal Drive at about 2:30 when a gray prop plane (can't identify, not my area of specialty - like an awac but didn't see any big discs on it)  flew east to west (south to north) seeming to follow the Potomac.  At first I wondered if it had taken off from DCA, but soon after saw a Delta Jet take off and realized the flight pattern was different.   Was it following the river or had it just come from Andrews?