How can the U.S govt. release spies who infiltrated NSA, FBI, CIA and other agencies?

a href="http://www.youtube.com/watch?v=JWpWc_suPWo" rel="nofollow"http://www.youtube.com/watch?v=JWpWc_suP…/a received this link;Just shocking how can 60 spies caught and released just because they are Israeli, couldn't believe? how can that be? and why wasn't it made into a huge story?