Today at the mall I was looking up into the sky when in the parking lot and I saw what looked like a UAL 722 flying into SEA. The weather here is not very good and the plane was flying in and out of the clouds but I did see the blue tail and blue undersides. Its possible it was another airline but I kind of doubt it. In fact the very bottom of the plane was bare metal just like UAL 722s are. Is it possible a few might still be roaming the skies? Possibly as a back up planes?