In addition to the rigorous background investigations, psychological and drug screening, as well as security interviews, DIA requires that its applicants pass the agency polygraph. In fact, DIA exercises operational control over the National Center for Credibility Assessment (NCCA), which establishes polygraphing standards and trains polygraphers for placement across the entire intelligence community. In 2008, the agency started expanding its polygraph program in an attempt to screen 5,700 prospective and current employees every year. This was a several fold increase from 2002 when, according to information provided to Congress, DIA conducted 1,345 polygraphs. According to the unclassified DIA document cited in the news report, since the mid-2000s the agency started hiring contract polygraphers in addition to the permanent DIA polygraphers, and added 13 polygraphing studios to those the spy organization already operated. This expanded polygraph screening at DIA continued notwithstanding documented technical problems discovered in the Lafayette computerized polygraph system used by the agency; the organization allegedly refused to change the flawed Lafayette polygraph but declined to comment as to the reasoning.