FORT MEADE, Md. (CN) - Pfc. Bradley Manning testified Thursday that he started the largest intelligence disclosure in U.S. history from a Barnes & Noble in Maryland, after the Washington Post and New York Times turned him down.
"I did believe, and still believe, that these documents are some of the most significant documents of our time," Manning said, echoing a note he wrote to WikiLeaks.
During a daylong hearing for his so-called "naked plea," the 25-year-old soldier spoke for the first time about how and why he started leaking. The admission bypasses prosecutors and goes directly to the judge.
Although he admitted to sending almost every file on his charge sheet, he pleaded guilty only to 10 of the 22 specifications against him, amending most to get a reduced sentence.
As pleaded, the charges carry a 20-year maximum, plus forfeiture, fine and dishonorable discharge.
Prosecutors still intend to pursue all charges against him, including "aiding the enemy," which carries a possible life sentence.
In the morning, Manning delivered a prepared speech that meticulously recounted his transmission of hundreds of thousands of military and diplomatic files to WikiLeaks. A military judge grilled him about his statement in the afternoon.
When he entered Ft. Leonard Wood, Mo., Manning said he felt neither "physically or mentally prepared" for basic training, but he found his niche upon his transfer to Fort Huachuca, Ariz., to train as an intelligence specialist.
He brought these skills to Forward Operation Base Hammer, where he was deployed as an intelligence specialist.
It was here that he first accessed incident reports from Iraq and Afghanistan, known as SigActs, short for significant actions.
"As an analyst, I viewed the SigActs as historical data," Manning said.
He added that these files can be sensitive when first produced, but that status wears off after the military's public affairs department reports the incidents to the press and public. This process usually takes three days, he said.
Although prosecutors claim that Manning "exceeded authorized access" by downloading these in bulk, Manning said analysts openly back up the files because the military server was prone to crashing.
At the time, he said he had no intention of sending the files to WikiLeaks or anyone else.
Manning acknowledged that he installed WinRar, a free software-compression program, on his computer to download the files in bulk, but he said that he openly did it because it was not a violation.
WikiLeaks allegedly first came on Manning's radar around Thanksgiving 2009, when the website published "purported SMS messages" sent by cellphones near the sites of the Sept. 11, 2001, attacks.
Manning said he concluded that the messages were "very likely real based on the detail."
Around that time, he said that he began to "routinely monitor" WikiLeaks as well as various news wires and reports by private intelligence firms like Strategic Forecasting, or StratFor.
Such research was "what good analysts were expected to do," he said.
Manning added that he had even used a WikiLeaks-published document about weapons trafficking to perform his duties as an intelligence specialist.
He said started to enter WikiLeaks chat rooms out of "curiosity" and found the discussions there to be "almost academic in nature" - and not only WikiLeaks-related.