A serious consideration for recruiters working for these agencies is that millennial truly fear the interview process. They believe that the NSA/CIA has their entire browsing history on file, that the interview process may see them confronted by some awful website they visited late one night in their teens. Or they fear any examination of their past may be shared with law enforcement. These are legitimate fears that recruiters must address. The reality is that such histories are not kept on file and/or are not part of the interview process.
(Similarly, many people don't realize themselves illegal immigrants/dreamers until they try to enlist in the army.)