Should Pfc. Bradley Manning be executed for treason and espionage?

Pfc. Bradley Manning is accused of leaking classified documents and video to Wikileaks and is currently being held in a Navy brig at Quantico VA. What do you believe his punishment should be and why?
Update: I believe he should be executed if found guilty of those charges, if found guilty of lesser charges he should get Dishonorable discharge and RE4 code.
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