this is my favorite piece of footage, watch as these same sphere/balls (debri :-) of light that kept the shuttle from returning recently, check out this footage from a earlier mission, of them flying into a circular formation, were talking flying into formation and then STOPPING then illuminating, if this isn't a sign of intelligence, i don't know what is.

First off, just keep in mind space debri can not just stop, that would brake the laws of physics...anyhow, enjoy

[link to www.youtube.com]