While people try to be unbiased, such a thing doesn't really exist. Bradley Manning getting a trial completely devoid of bias simply could not happen in this country, and others would not be fit to handle the case. The trial was handled as professionally as can be expected in a situation with emotions from betrayal running so high.
The purpose of Bradley Mannings trial was to make an example of him. Fair trial is not even existent in his circumstances. The people supported Bradley Manning, to a large extent. He was not found guilty of aiding the enemy, which would have been beyond ridiculous, as he was trying to help the American people. Bradley Manning is a heron in many peoples eyes, but has been dealt with seriously, to set an example of what happens to leakers.