This was the last shot of the night I took while goofing around.  The camera was in Bulb mode because it was 10 at night and I just wanted to fire it for a minute just to see what it came out as.  I was aiming at the reflections in the Potomac River more than anything.  I came close to a minute by just manually counting and I like how I captured the river in motion as well being so dark.  This was a test of the Sigma 60mm 2.8n lens more than anything else.