Snapped these photos while running near Arlington Cemetery. I also saw some sort of bird of prey (hawk, eagle, owl, who knows?) swoop by with some small animal in its talons (given that this is DC, it was probably a rat). It was an impressive sight, but it was too far away to capture with my cell phone, and I was too slow on the draw.
I wonder if this section of the Potomac is always this mucky green consistency during this time of year?