FORT MEADE, Md. (AP) — More than three years ago, Army Pfc. Bradley Manning was arrested in Iraq and charged in the biggest leak of classified information in U.S. history.

Since then, he admitted to sending troves of material to the anti-secrecy website WikiLeaks and pleaded guilty to charges that would send him to prison for up to 20 years. The U.S. military and the Obama administration weren’t satisfied, though, and pursued a charge of aiding the enemy, which carries a potential life sentence.