NASA TV UFOs:
UFO over Houston, Texas Seen from Space
This NASA UFO footage must rank among the best ever.
The video seems to show a disk shaped UFO with a dome, which fly in a circular path. At one point the UFO tilts so that the UFO is seen from the side.
And when the UFO turns to the left and accelerates 58 seconds into the video, it seems that the sunlight reflects off the object's right side.
The footage comes from an unknown Space Shuttle mission.
The unknown object enters the top centre of the screen in the first second of the video:
http://www.youtube.com/watch?v=JiDEBAnVXyE
Several other unknown objects are also seen in the video.