We've got some pretty clear, impressive footage of a super bright white circular object (or orb) slowly traveling through the sky. However, while it definitely appears the orb is moving (the trees are a great reference), it's hard to pin down how fast or where it's really going, as the videographer appears to be moving as well.
This is certainly no balloon or road flare or meteor. However, it could be a plane or helicopter, although the lighting and the pace seem a little odd for that.
Ideas? Did you see something similar on the night of March 16th in Arlington? Let me know!nMeanwhile, here's the video: