In recent decades, a quiet revolution has been transforming the way Washington works.
Because the U.S. government does not have the workforce to complete all of its tasks, it employs private companies like Booz Allen Hamilton to do the work for it. Booz Allen is the company where Edward Snowden, who said he leaked secrets about the National Security Agency, most recently worked.
Over the past 25 years, this contract workforce has grown and plays a major role in the U.S. government, says Paul Light, a professor of public service at New York University.