Approximately 21:52 EST on July 3rd at KIAD - Washington Dullus Airport
Twin piston piper seneca could not get a green light for his left main gear, he goes around for the 1R approach at dullus and attempts to get confirmation on the gear with a low approach on 1C. Ground crew state it appears to be down and he comes back around for a visual on 1C and lands without incident. Good job controllers and good job pilot being ahead of the game and asking the right questions and requests. He did appear to loose sight of the 1C runway when coming back in for the landing, tower controller states he cannot clear him to land unless he has a visual on the runway.
Here's the flight paths:
http://flightaware.com/live/flight/N211SK/history/20090703/2340Z/KXLL/KIADKIAD METAR - 040052Z 27004KT 10SM BKN080 23-14 A2997