Bradley Manning Sentencing

Nelson Mandela, who brought down apartheid, spent 27 years in jail;  but Bradley Manning, who exposed U.S. war crimes and brought about the Arab Spring, was sentenced to 35.

 For something to be a crime, harm must have been done to someone. Where is the harm ?? Is he not a whistle blower ?? He did not leak anything that needed to be classified, rather he embarrassed some powerful people. I hate to say this, but he angered the wrong people and he's not going to live long in jail--either someone will kill him in a "fight" or he'll conveniently "commit suicide". If Obama was a real President, he'd pardon this guy today but since he is behind Manning's persecution--"Not gonna Happen".