OK, so this beats the brown creeper sighting. Today at noon, I was waiting at a red light at Wilson Boulevard & John Marshall Drive in Arlington near the Falls Church line. I spotted a bald eagle gliding high above the Madison Manor neighborhood:
That black dot between the power lines is the eagle. Apparently my own personal Murphy's law of bird-watching is that anytime I see a bald eagle, I don't have a high quality camera with me. I once saw a bald eagle swoop down over the Potomac & catch a huge fish with its talons - no camera with me.