(AP) FORT MEADE, Md. - A military judge refused on Wednesday to dismiss the charges against an Army private accused in the biggest leak of government secrets in U.S. history. Army Col. Denise Lind denied the defense motion during a pretrial hearing at Fort Meade in the court-martial of Pfc. Bradley Manning. Complete Coverage: WikiLeaks In seeking the dismissal, Manning's lawyers had argued that prosecutors were so slow in sharing required information with the defense that the only remedy was to throw out the charges. Prosecutors said they worked diligently to meet their obligations. They maintained that they needed time to obtain documents from civilian agencies and search the records for relevant material. The 24-year-old Oklahoma native was ordered court-martialed after he was accused of downloading the documents, diplomatic cables and video clips, then sending them to WikiLeaks. He was working as an intelligence analyst in Baghdad when authorities say he copied classified material from government computers in late 2009 and early 2010. The material WikiLeaks published included cockpit video of a 2007 U.S. Apache helicopter attack that killed a number of civilians, including a Reuters news photographer and his driver. The U.S. government says the civilian deaths were accidental. Manning has been in pretrial confinement since he was charged in May 2010. His treatment at a Marine Corps base caused support for him to swell. The Quantico, Va., brig commander kept Manning confined 23 hours a day in a single-bed cell, citing safety and security concerns. For several days in March 2011, he was forced to sleep naked, purportedly for injury prevention, before he was issued a suicide-prevention smock.