washington former u.s. national security agency employee plead guilty friday illegally take classify information outside spy agency intelligence official say late steal home computer russian hackers nghia hoang pho work nsa elite hack unit retain u.s. government document contain top-secret national defense information 2010 march 2015 justice department say pho 67-year-old u.s. citizen bear vietnam face 10 years prison hold authorities await sentence schedule april 2018 u.s. district court baltimore u.s. intelligence official speak condition anonymity say pho nsa employee identify media report use kaspersky lab antivirus software home computer u.s. officials say software moscow-based company allow russian intelligence agencies pilfer sensitive secrets unite state pho computer department homeland security september order federal agencies start remove kaspersky software computers u.s. officials say firm either tie russian intelligence force share information hold servers russian officials kaspersky repeatedly deny allegations acknowledge software 2014 take nsa code hack tool customer computer chief executive eugene kaspersky order code destroy court document appear make mention russian intelligence agencies kaspersky lab connection first report new york time intelligence official decline comment whether pho know software use home vulnerable pho least third nsa employee contractor charge within past two years count improperly take classify information agency breach prompt criticism secretive nsa federal grand jury indict former nsa contractor harold martin february charge allege spend 20 years steal 50 terabytes highly sensitive government material u.s. intelligence community hoard home june another nsa contractor reality winner 25 charge leak classify material russian interference 2016 u.s. presidential election news outlet plead guilty 2013 former contractor edward snowden pilfer secrets nsa surveillance program share journalists live moscow pho ellicott city maryland take physical digital document contain highly classify information unite state include information label top secret accord court record unseal friday aware document contain sensitive information keep residence maryland record say ask comment pho attorney robert bonsib say conversations regard case make courtroom sentence decline comment officials nsa u.s. intelligence agencies immediately respond request comment nsa whose main mission gather analyze foreign communications potential security threats base fort meade maryland ex-u.s. nsa employee plead guilty take classify document