NASA TV UFOs: Unknown Objects Filmed near the Space Shuttle, 11/12/13 May 2009, STS-125 (HST-SM4) Mission

In the below video one can see several unknown objects, which manoeuvre/hover very close to the Space Shuttle:

http://www.youtube.com/watch?v=0bV88H-xru8

The NASA STS-125 (HST-SM4) Space Shuttle Atlantis mission:

Launch date: 11 May 2009 -
Landing date: 22 May 2009.