Why was it considered treason for Bradly Manning to sell his stolen documents to the media but Edward Snowden is not charged with similar crimes?

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Why was it considered treason for Bradly Manning to sell his stolen documents to the media but Edward Snowden is not charged with similar crimes?

Question Description

Why was it considered treason for Bradly Manning to sell his stolen documents to the media but Edward Snowden is not charged with similar crimes?

Looking for an answer in about 125 or so words please

Reference: http://digital.films.com/PortalPlaylists.aspx?aid=7967&xtid=52590