NASA TV UFOs:
UFO Flies Straight Towards the Space Shuttle and Stops,
19 May 2009
The self-luminous, oval shaped, unknown object seemingly flies straight towards the Shuttle (STS-125/HST-SM4), then stops (or rather starts to fly with the same pace as the Shuttle) and after a while starts to descend (on the screen):
http://www.youtube.com/watch?v=hJvPle4WWhs
Another unknown object which blinks on and off, is seen on the left side of the screen.
NOTE: New video presents an analysis of the UFO footage:
http://www.youtube.com/watch?v=L7QeMxSOeXY