Amnesty International

United States Army / Wikimedia Creative Commons

Amnesty International is urging the U.S. government to drop its most serious charges against an Army private who gave reams of classified documents to the anti-secrecy group WikiLeaks. 

The London-based human rights organization said Friday that prosecutors at Pfc. Bradley Manning's court-martial haven't proven he aided the enemy. A conviction requires proof that Manning knew the material would be seen by America's enemies on the WikiLeaks website.

Aiding the enemy is the most serious of 21 contested counts. It carries a possible life sentence.