This is a great compilation of NASA footage showing unknown objects. Some just happen to pass by the field of view, while others appear to be purposly tracked and discussed by NASA.[youtube width=”480″ height=”385″]http://www.youtube.com/watch?v=WlLN_Jcg1pc[/youtube]
What are they? Does NASA know? The answer is probably yes. Are they extraterrestrial? Maybe a few, but I suspect the majority are terrestrial in origin… aka secret project stuff!