Patrick Semansky, Associated Press
Army Pfc. Bradley Manning, right, is escorted from a security vehicle to a courthouse in Fort Meade, Md., Thursday, Dec. 22, 2011, for what is expected to be the final day of a military hearing that will determine if he should face court-martial for his alleged role in the WikiLeaks classified leaks case.

FORT MEADE, Maryland — A U.S. military prosecutor says an Army intelligence analyst defied the nation's trust by pulling more than 700,000 documents from a supposedly secure computer network and giving national secrets to WikiLeaks.

But Bradley Manning's defense attorney said during closing arguments Thursday that the Army failed the 19-year-old and is piling on charges in an attempt to force him into pleading guilty.

The arguments ended a preliminary hearing to determine whether Manning should be court-martialed on 22 charges, including aiding the enemy. He faces life in prison.