Now - Bergdahl.
Then - Edward (Eddie) D. Slovik, US 3rd Army, 28th Infantry Division "Keystone Division". Executed (by firing squad) on 31Jan45. Offense: Desertion in time of War, and
Convicted of Collaboration in time of War, "Toyko Rose" - served long prison sentence in United States.
The difference is: One very different country.
http://en.wikipedia.org/wiki/Tokyo_Rose